Ironmaster Quick-Lock Dumbbells Review & Complete Product Guide

Ironmaster Quick-Lock Dumbbells Review & Complete Product Guide

The Ironmaster Quick-Lock Dumbbells are one of the best pieces of weight training equipment you can buy for your home gym.

They are highly versatile, extremely durable and simple to use.

If you currently workout with barbells only, or with an incomplete or poor quality dumbbell set, then the Ironmaster Quick-Lock Dumbbells will give you the ability to do a plethora of new and effective exercises.

Buy Ironmaster Dumbbells

In short, they’ll give you more productive workouts, which in turn, will accelerate your progress.

On this page, I’ll present all the helpful information that I learned from thoroughly researching the Ironmaster Quick-Lock adjustable dumbbells. I was researching these to decide whether or not to purchase them for my home gym…

…And for the record, I did end up buying them.

To clarify, this page includes my detailed outline and analysis of this product, based on my in-depth research on it; plus, a collection of relevant resources.

UPDATE 02/21/17: This page was originally written in November of 2011, right after buying the dumbbells. Now I’ve had them for over 6 years. I can confirm that these these dumbbells are awesome. I’m extremely happy with my purchase.

Unfortunately, I no longer have access to a home gym since I moved. I can only use these when I visit my parents. But once I have access to a home gym, you can bet I’ll bring these with me.

Ironmaster Quick-Lock Dumbbells: An Overview

I’ll start by briefly discussing the most basic features of this dumbbell set. This way, you’ll have a general understanding of the product before I get into too much detail…

…Before I start my spiel, though, I recommend watching the below video as a primer. It covers most of the basic points and gives you the visuals to go along with it:

The main component of the Ironmaster Quick-Lock Dumbbell system is the base set, which gives you a maximum dumbbell weight of 75 lbs.

But the fun doesn’t stop at a measly 75 pounds, folks. There are two optional add-on kits that you can purchase to increase the maximum dumbbell weight…

…The first add-on kit, as shown in the video above, allows you to use up to 120 lbs. per dumbbell. The second kit, which isn’t shown or mentioned in the above clip, raises the max weight per dumbbell to a whopping 165 pounds! (The 120 lb. kit is required to use the 165 lb. kit.)

Of course, most people won’t need or want the second add-on kit, at least to begin with. Still, it’s nice to know that you always have that option on the table.

The other major draws of this adjustable dumbbell set are the many compatible accessories and complementary equipment available (i.e. fat grip adapter, kettlebell attachment, straight bar, EZ-curl bar, Super Bench, dumbbell spotting stand) that enhance and expand its functionality. I’ll discuss these options in greater detail, later.

How do the dumbbells work?

The Ironmaster adjustable dumbbells use the Quick-Lock screws to secure the weights to the dumbbell.

With the dumbbell handle lying horizontally, you place the desired number of plates against the dumbbell handle. Check that each plate is properly aligned; the grooves on the back of each plate should fit securely into the grooves of the plate in front of it…

…Then, take one of the Quick-Lock pins and insert it through the center hole of the plates so that the arrow on the pin is in line with the indentation of the dumbbell handle. Proceed to screw it into the handle until it’s tight.

Repeat this process on the other side of the dumbbell, and then again on both sides of the second dumbbell.

The video below (starring yours truly) demonstrates how simple it is to both add and remove weight:

Pros & Cons of the Ironmaster Quick-Lock Dumbbells

Having now finished my summary of the Ironmaster Quick-Lock Dumbbells, I’ll get to the part that you probably care about most: the pros and cons of the Ironmaster Dumbbells.


  • Natural look & feel: Feels and looks like a traditional fixed dumbbell. Unlike some of the more “creative” adjustable dumbbells out there (e.g. PowerBlock), the Ironmasters actually feel like fixed dumbbells when you handle them. They also look quite similar to fixed dumbbells, with the minor difference of square-shaped weights.
  • Expandable to 165 lbs: Greatest expandability of (almost) any adjustable dumbbell on the market, of up to 165 lbs. Spinlock or Olympic handles are the only types of adjustable dumbbells that you could expand to more than 165 lbs., though doing so would entail using taller weight plates, which sacrifices functionality on some exercises.
  • Heavy-duty durability: Thanks to their simple design and all-metal construction, these dumbbells can take a beating. Even with less-than-gentle use, the likelihood of damaging these dumbbells is minimal. This doesn’t mean you should slam the dumbbells on the floor or toss them around just “because you can.” That would be careless, and generally stupid behavior. What it does mean, though, is that you don’t have to coddle the weights like a newborn baby.
  • Secure weights: Once the weights are locked in, they stay locked in. There’s no rattling, shaking or loosening of dumbbells. This means you can lift them explosively or use them in swinging motions, without fear of the plates flying off.
  • Accessorizabilty!: The Ironmaster Quick-Lock dumbbell system has many accessory attachments available, which greatly expand your training options. I’ll talk about these attachments later on this page.
  • Included dumbbell rack/stand: An accompanying stand comes standard when you buy the Ironmaster Quick-Lock dumbbell set. It’s very compact in size (14.5″ W x 19″ D x 26″ H), yet still large enough to fit a fully loaded pair of dumbbells on its top, and store all of its weights (including the optional 120 lb. add-on kit) within it. Thus, it serves to fulfill the average home gym owner’s requirement to maximize space efficiency. Standing at just over two feet tall, it is specifically designed to facilitate racking/unracking the dumbbells in an ergonomically sound fashion.
  • Knurled steel on handles & knobs: Knurled steel on the screw knobs makes it easier to grasp onto the Quick-Lock screws and twist them on or off. The knurled steel on the dumbbell handles ensures you maintain the tightest possible grip on the dumbbells, even if your hands are drenched in sweat. The only catch is that you’ll have to endure some minor discomfort while your hands adapt to the rather harsh texture.
  • Customizable load distribution: You can load each end of the barbell independently of the other. This means that you can make one end heavier than the other end, if you so desire. Obviously, you would load the dumbbells evenly for the vast majority of exercises. But there are some movements where an uneven load is required (e.g. pronations, supinations, deviations) or desirable (e.g. hammer curls).
  • Plates compatible with any standard bar: The Quick-Lock plates will fit on any standard (1″ diameter) barbells or dumbbell handles that you have in your gym. So if you should ever have the need, you can use these plates on those bars without any issues.
  • Money back guarantee & lifetime warranty: You get a thirty day money back guarantee, with shipping covered if you decide to return it. The lifetime manufacturer’s warranty which includes repairs and part replacements (though you’d pay). See the full terms and conditions.


  • Longer adjustment time: The main downside of the Ironmasters is that it takes longer to adjust their weight, compared to “quick change” adjustable dumbbell sets like the PowerBlocks. It typically takes somewhere between 15 seconds to 90 seconds to adjust the weight. It varies depending on the amount of weight you’re adding/removing, whether you’re adjusting one or both dumbbells, and whether you are trying to change it as fast as you can or if you’re taking your sweet-ass time. 😀
  • Uneven weight distribution if using XX.5 lbs: If you’re trying to use a weight that’s not a multiple of 5 lbs. (e.g. 22.5, 57.5, etc.) by adding just one of the 2.5 lb. plates, then the dumbbell will be slightly heavier on whichever side you put the plate. This isn’t a problematic issue, though, because you can simply hold the weight slightly off-center to make it balanced.
  • Some organization required: Unlike the simple and convenient self-containing storage feature of dumbbell systems like the PowerBlock, the Ironmaster Quick-Lock dumbbells require separate storage of the many individual weight plates. Although the included dumbbell stand provides dedicated storage space, you must still maintain some level of organization within it. Otherwise, you waste time sorting through a disheveled mess of weights to find the right one. I personally don’t believe that this issue deserve a full-blown “con” status, since the worst case scenario is that you experience a temporary and minor inconvenience. However, I’ve included it here because the significance of this issue is for you to judge, not me.
  • Dumbbells/plates slightly lighter than stated: First off, thanks to Patrick A. for pointing this “con” out to me – When fully loaded, each dumbbell is closer to 70 lbs, than it is to the stated 75 lbs. Also, the weights of the individual plates weight plates can vary slightly from their stated weights, meaning one dumbbell can weigh up to 300 grams (2/3 lbs) more than the other (up to 800 grams, or 1¾ lbs, on the 120 lb set). In Ironmaster’s defense, they do advertise 75 lbs as the nominal weight. And the weight can vary between plates because of inconsistent steel quality in the manufacturing process. While all of this is worth noting, I don’t think it’s a big deal. The nominal vs. real poundage of the weight is unimportant; what’s matters is if you’re progressing or not. And the potential weight difference between dumbbells is pretty negligible (I’ve never felt any difference).

Ironmaster Adjustable Dumbbell Reviews & Demos

Below, I’ve compiled the most helpful video reviews that I found for the Ironmaster Quick-Lock Dumbbells.

The first two video reviews are from ordinary weight trainees…

…The third set of video reviews, as you’ll see, is from a not-so-ordinary lifter who you may recognize.

Review #1:

Review #2:

Review #3:

Below are three clips of IFBB pro bodybuilder Lee Priest reviewing and using the Ironmaster Quick-Lock Dumbbells during his chest workout.

Product Specs

75 lb. Base Set

75 Pound Ironmaster Quick-Lock Dumbbell Set

  • The base set includes 2 x 5 lb. dumbbell handles, 24 x 5 lb. weight plates, 4 x 2.5 lb. plates and 4 standard-sized Quick-Lock screws
  • 5 to 75 lbs.
  • Adjusts in 2.5 lb. increments
  • 6.5″ W x 6.5″ H x 14.5″ L (14.5″ length when fully loaded)
  • Included stand for racking the dumbbells between sets, as well as for storing plates and pins. Its dimensions are 14.5″ W x 19″ D x 26″ H.
  • Price: $584 ($499 + $85 S&H)

Optional 120 lb. Add-On Kit

120 Pound Ironmaster Quick-Lock Dumbbell Add-On Kit

  • You must first have the 75 lb. base unit for the 120 lb. kit to work.
  • The kit includes 4 x 22.5 lb. plates (45 extra lbs. per dumbbell) and 4 extended-length Quick-Lock screws (2 per dumbbell)
  • 70 to 120 lbs.
  • 2.5 lb. increments
  • 6.5″ W x 6.5″ H x 18.5″ L (18.5″ length when fully loaded)
  • Fully loaded dumbbells still fits on the stand
  • Price: $260 ($215 + $45 S&H)

Optional 165 lb. Add-On Kit

165 Pound Ironmaster Quick-Lock Dumbbell Add-On Kit

  • You must first have the 120 lb. add-on kit, as well as the 75 lb. base unit, to use all 165 lbs.
  • The 165 lb. add-on kit includes 4 x 22.5 lb. plates (an extra 45 lbs per dumbbell) and 4 extra-long screws. These screws are different than the screws used in the 75 lb and 120 lb sets in that they are fully threaded (as opposed to partially).
  • 122.5-165 lbs.
  • 2.5 lb. increments
  • 6.5″ W x 6.5″ H x 23.5″ L (23.5″ length when fully loaded)
  • Fully loaded dumbbells won’t fit all the way on the rack
  • You must custom order this kit via phone (US: 800-533-3339, Int’l: 425-408-9040).
  • Purchase is non-returnable and non-refundable
  • Expect delivery to take 2-3 weeks
  • The original warranty is void if you drop, or otherwise mistreat, the dumbbells when using the 165 lb. kit. This is because the dumbbell set was originally designed to withstand rough use for a maximum weight of 120 lbs using the partially threaded Quick-Lock screws.
  • Price: $283 ($235 + $48 S&H)

Quick-Lock Screws

Each of the three dumbbell kits (75lb/120lb/165lb) have varying screw sizes, though they share the following commonalities:

  • The knob size on all three screw size is the same: 4 inch diameter, 0.5 inch thickness.
  • There is knurled steel around the edge of each knob, which allows you to easily grip onto and untwist the screw.
  • The screws are constructed from chrome-plated solid steel

Again, the above are the similarities of the screws. The differences are shown in the images and descriptions below:

75 lb. Quick-Lock Screws

As shown below, the screws for the 75 lb. base unit are 4 inches long and weigh 2.5 lbs.

Quick-Lock Screw for 75 Pound Ironmaster Quick-Lock Dumbbells

120 lb. Quick-Lock Screws

As shown below, the screws for the 120 lb. add-on kit are 6 inches long and weigh 3 lbs.

Quick-Lock Screw for 120 Pound Ironmaster Quick-Lock Dumbbell Add-On Kit

165 lb. Fully-Threaded Screws

As shown below, the screws for the 165 lb. add-on kit are 8.5 inches long and weigh 3.5 lbs. Additionally, these screws differ from those from the 75 lb. and 120 lb. sets in that they are fully (not partially) threaded…

Fully Threaded Screw for 165 Pound Ironmaster Quick-Lock Dumbbell Add-On Kit

…That is, the threading wraps all the way around the screw’s circumference, as opposed to only part of the way around it.

Because of this design, these screws aren’t actually “Quick-Lock” screws, since you have to screw them in all the way (instead of sliding them in most of the way before tightening them). This provides extra tightness to ensure the weights remain in place with the heavier load.

Dumbbell Handles

  • 5 lb. handle
  • 6.5″ inner handle length
  • 7″ total handle length w/o plates or screws (8″ with screws)
  • 1.25″ handle diameter
  • The dumbbell ends have recessed grooves that are designed to hold the first weight plate in place, and prevent it from moving

Empty Ironmaster Quick-Lock Dumbbell Handle

Weight Plates

There are three plate sizes for this dumbbell set: 2.5, 5 and 22.5 pounds. All three have the same length and width dimensions of 6.5″ x 6.5″. However, they vary in thickness. Below are their respective thickness specifications.

  • 2.5 lb. plates are approx. 0.25″ thick.
  • 5 lb. plates are approx. 0.5″ thick.
  • 22.5 lb. plates are approx. 2.25″ thick.

2.5 lb, 5 lb & 22.5 Ironmaster Quick-Lock Weight Plates

Other notable information about the weight plates includes the following:

  • Standard 1″ diameter center hole
  • Cast iron construction with a painted black surface
  • Each plate is within 3% of its stated weight
  • The plates have an interlocking design, which keeps them aligned and secure


Optional Accessories

All of the following accessories can be found here.

Fat Grip Adapter Handle

If you want to enjoy the benefits of thick bar training, then you’re in luck. The Fat Grip Adapters allow you to increase the dumbbell handle diameter so you can improve your grip and accelerate your forearm development.

Ironmaster Fat Grip Adapter

The Fat Grip Adapter specifications are listed below:

  • There are two different fat grip adapters available that increase the original 1.25″ handle diameter size. One will increase it to 1.5″, and the other will increase it to 2″.
  • The adapters are made from a high-strength plastic composite material.
  • Just as with the regular dumbbell handles, the fat grip adapters have knurled textures, which facilitates a more secure and better quality grip.
  • Each adapter consists of two halves, which you secure around the handle with small screws. Keep a Phillips screwdriver nearby if you want to take them on and off during your workout.
  • Price: $35 ($29 + $6 S&H)

Ironmaster Quick-Lock Kettlebell

The Quick-Lock kettlebell is a innovative, yet simple design that uses the same plates and pins as the dumbbells. So if you’ve already got the dumbbells, then all you need is the kettlebell attachment, itself.

Ironmaster Quick-Lock Kettlebell

The notable information about the kettlebell includes:

  • Handle weighs 22.5 lbs.
  • Adjustable in 2.5 lb. increments
  • 1.375″ diameter grip
  • Solid steel construction; no knurling.
  • Maximum weight is 57.5 lbs. when using 32.5 lbs. worth of plates (i.e. 6 x 5 lbs. + 1 x 2.5 lbs.), along with an accompanying standard-sized Quick-Lock screw (i.e. the kind used in the 75 lb. base set).
  • Maximum weight is 80 lbs. when using 55 lbs. worth of plates (i.e. 1 x 22.5 lbs. + 6 x 5 lbs. + 1 x 2.5 lbs.), along with an accompanying extended-length Quick-Lock screw (the kind used in the 120 lb. add-on kit).
  • Price: $108 ($89 + $19 S&H)

While I’ve personally never done any kettlebell work, I am certainly tempted to buy this nifty attachment so that I can start learning. That said, I wouldn’t seriously consider this purchase until after buying the 120 lb. add-on kit.

Quick-Lock Kettlebell Overview

Watch the clip below for a general outline of the kettlebell attachment, its uses and how it works.

Quick-Lock Kettlebell Exercises

The Ironmaster Quick-Lock kettlebell attachment introduces a whole host of new and different exercise options. In this video, professional MMA fighter Lyle Beerbohm demonstrates many of the movements made possible by the kettlebell attachment.

Workout Demo

A personal trainer does a quick review of the kettlebell attachment and then performs a workout using it.

Quick-Lock EZ-Curl Bar Attachment

An EZ-curl bar gives you a few more options for biceps and triceps exercises.

Ironmaster EZ-Curl Bar

The major specs and measurements for this accessory include:

  • 7″ ends (i.e. space available on each side for plates)
  • 48″ total bar length
  • 34″ inside grip length
  • Solid steel construction with knurled grip
  • Uses spinlock collars to secure plates
  • If you have the four 22.5 lb. plates from the 120 lb. add-on kit as well as the weights from the 75 lb. set, then the maximum load is 165 lbs. (15 lb. bar plus 75 lbs. per side).
  • If you have only the plates from the 75 lb. set, then the max bar weight is 145 lbs. (15 lb. bar plus 65 lbs. per side).
  • Adjustable in 2.5 lb. increments
  • Price: $92 ($75 + $17 S&H)

Quick-Lock Straight Bar Attachment

Ironmaster Straight Bar

The major specs and measurements for this accessory include:

  • 11.5″ ends (i.e. space available on each side for plates)
  • 66″ total bar length
  • 42.5″ inside grip length
  • Solid steel construction with knurled grip
  • Uses spinlock collars to secure plates
  • If you have the four 22.5 lb. plates from the 120 lb. add-on kit as well as the weights from the 75 lb. set, then the maximum load is 228 lbs. (18 lb. bar plus 105 lbs. per side).
  • If you have only the plates from the 75 lb. set, then the max bar weight is 160 lbs. (18 lb. bar plus 65 lbs. per side).
  • Adjustable in 2.5 lb. increments
  • Price: $100 ($75 + $25 S&H)

Ironmaster Super Bench

The Super Bench is better categorized as being a separate piece of equipment that is complementary to the Ironmaster Quick-Lock Dumbbell system, than as an accessory to it…

Ironmaster Super Bench

…That said, I’ve nonetheless included it in this section because of its compatibility when used with the dumbbells and other dumbbell accessories (e.g. the spotting stands).

However, I won’t delve into details on the bench, as that would require a page of its own. Instead, the two videos below are sufficient for this page.

Super Bench Overview

See the video below for an overview of the Super Bench.

Super Bench Exercises

The video below shows the several exercises you can do on the Super Bench.

Spotting Stand & Spotting Stand + Super Bench Combo

As with the Super Bench, the dumbbell spotting is most precisely categorized in a class of its own, rather than as an accessory or attachment specific to the Quick-Lock dumbbell system…

Ironmaster Quick-Lock Dumbbell Spotting Stand and Super Bench Combo

…As such, I’ll skip over the specific stats, and instead provide the following summarizing video clip:

Spotting Stand Overview

To gain a better understanding of how the dumbbell spotting stand works, take a look at the video below.

Instructions & Documents

Buy It!

Buy Ironmaster DumbbellsAre you ready to buy your own pair of Ironmaster Quick-Lock Dumbbells?

UPDATE 01/21/13: After using my pair for over a year now, I can say that they exceeded my expectations. I absolutely love these things. So much that I also bought the 120 lb. add-on kit and the fat grip handles.

If this review/product guide has convinced you that these dumbbells will meet your needs, I’m confident you’ll be just as happy with your purchase as I’ve been with mine.

Click here to buy if you’re ready to invest in your own set of Ironmaster Quick-Lock Dumbbells.

About the Author Alex

Hey! My name is Alex, and I'm the owner and author of King of the Gym. I started this website back in late 2009 during college, and it has been my pet project ever since. My goal is to help you learn proper weight training and nutrition principles so that you can get strong and build the physique of your dreams!

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Leave a Comment:

Spencer says July 11, 2017

Hello, I was wondering if I should start with the 5 lb – 45 lb iron master dumbbell weights or if it would be better to go ahead with the 70 lb, 120 lb, or 165 lb upgrade ? Keep in mind that I want the 5 lb (to start out with) for some exercises.


    Alex says July 12, 2017

    Hi Spencer, thanks for the question.

    I would recommend starting with the 5-75 lb. dumbbell set + dumbbell stand combo — It’s the one that retails for $648, though as I write this, it looks like it’s currently on sale for a bit less.

    Here’s my reasoning:

    • With this you can still start with as low as 5 lbs. From your comment, it wasn’t clear if you realized this, so I wanted to reiterate it.
    • You’ll want to get the dumbbell stand. Without this stand, I can tell you, it’d be a pain in the ass add, remove, organize and store the weights and dumbbells.
    • You can go all the way up to 75 lbs. Even advanced lifters can do most of their dumbbell work with 75 lbs (depending on the exercises and the rep ranges of course). This is to say that, you’ll be able to use these for quite a while before it makes sense to get the 120 lb and 165 lb add on kits.
    • If you only get the 5-45 lbs dumbbell set (which doesn’t come with the stand), you’ll outgrow it relatively soon. At which point, you’ll need to buy the 75 lb. add-on kit.
    • Even if you don’t think you’ll need higher than 45s at first, you may be wrong. I don’t know your current level of fitness. However, even if you’re a total beginner, chances are there are at least a couple exercises out there that you’d need more than 45 lbs for at your current strength level (i.e. dumbbell shrugs, dumbbell squats, dumbbell goblet squat, farmer walks–just to name a few). So, if you end up get just the 45 lb DBs at first, then you won’t be able to any of these types of exercises to effectively until you get the 75 lb add-on.
    • You’ll save money in the long term. As mentioned in the previous bullet point–if go with the 45 lbs dumbbell set, you you would need to buy the 75 lb. add-on kit pretty soon after. When you buy that add-on kit separately, you pay a premium. Let me break it down like this: If you get the 75 lbs DBs + DB stand combo, the retail is $648 vs. if you get the 45 lbs DBs and then later purchase the 75 lbs add-on, the total retail is $569 ($408 + $161), which is $79 less than the 75 lb db/stand combo, BUT you don’t have a stand! Buying a stand separately also runs a premium compared to buying it as part of the combo–its retail price is $151. Add that to the $569, and you end up paying $720 over time instead of paying $648 all at once to get all the same equipment.

    So that’s my long-winded explanation for my recommendation. Hopefully it makes sense and you see the logic in getting the 75 lbs DB/stand combo from the get-go. It’s the same thing I did when I first got my Ironmaster DBs. I bought the 120 lb and 165 lb add-on kits a while after that, only when I needed them.

    Let me know if you have any follow up questions.


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