Quick-Lock Custom 165 lbs (74.8 kg) Add-on Kit


  • World’s STRONGEST adjustable dumbbells.
  • Same look and feel as traditional dumbbells.
  • Takes each dumbbell up to 165 lbs (75 kg).
  • Fully loaded dumbbell is 60 cm long.
  • Includes 4 x 22.5 lbs (10.2 kg) plates & 4 x extra long fully threaded screws.
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(3 customer reviews)

In stock

Do you already own the Ironmaster Quick-Lock Adjustable Dumbbell Set and 120lbs Add-on Kit? If you want to ramp up your workouts with some seriously heavier lifting, you need this add-on kit.

Until recently, this add-on kit was only available as a special request. But it proved so popular that we’ve added it to our permanent product range. This custom built add-on weight kit for our Quick-Lock Dumbbells brings them up to 165 lbs / 75 kg  (for the 120-165 lbs / 54-75 kg range).

This add-on kit adds 45 lbs (20.5 kg) to each dumbbell. You’ll need the 75 lbs dumbbells plus the 120 lb Add-on Kit first.

This options is indispensable for heavy weight trainers, professional athletes and anyone advancing their home gym training beyond the basics.

“What you get with these is a piece of equipment that you can load up to 165lbs on and then throw out a second story window without breaking anything (watch the torture tests).” – Justin

Why choose the QLDB Custom 165 lbs Add-on Kit?

Our quick-lock adjustable dumbbells are a flagship product. They’re everything we stand for as a brand. Uncompromising quality. Strength and durability. No-nonsense, beautiful kit. Equipment which works as hard as you do. This add-on option makes them work even harder for you.

Increase your potential

IronmasterUK QL Dumbbells 165lbs specifications

With the Ironmaster Quick-Lock Adjustable Dumbbell Add-on Kit, you can expand your dumbbell weight to 165 lbs (75 kg) each.

You must have the 75 lbs dumbbells and the 120 lbs Add-on Kit first. This 165 lbs Add-on Kit is used on top of the 120 lbs dumbbells.

The extra long locking screws are fully threaded, so they need to be screwed in and out all the way to make a weight change. This adds extra strength and safety when you’re taking things to the upper weight range.

Note: Please expect a little extra time required to make a weight change.

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Unbeatable Quality

This add-on kit is made from top quality steel and iron with no plastic parts. The high-grade steel handles are chrome plated and each weight plate is precision cast and hand machined.

The World’s Strongest Adjustable Dumbbells?

Are these the world’s strongest adjustable dumbbells? It may be a bold claim, but we back it up by providing a lifetime warranty. This is commercial-quality kit for your home gym. We’ve thrown everything at these dumbbells, and they still work!

This is equipment designed and developed by guys who love training as much as you do. And it’s used by some of the strongest athletes in the world.

This add-on gives you the opportunity to add some serious weight to your Ironmaster Adjustable Dumbbells. We guarantee that they can withstand anything and will last a lifetime. You won’t need to think about anything except lifting.

Just drop the weight at the end of your set, if that’s your style. Our dumbbells are so strong and durable that they can withstand impact. No rattling plates, no wobbling parts. And the locking system is solid.

Load them up, lift them, and set yourself up for your first rep.

Buy it once, Buy it right

If you are starting up your home gym or upgrading old, substandard equipment you have come to the right place.

You could buy cheaper home gym equipment. But do you really want to take that risk?

With Ironmaster, we make the decision simple. We give you all the facts, and show you how our high quality kit saves you space and expands the capabilities of your home gym. Our materials, design and durability means you will never need doubt your equipment.

Why buy cheaper when you’ll need to replace that kit in a few years? Ironmaster will keep pace with your training for life (and we give you a lifetime warranty for extra peace of mind).

Don’t settle. Buy the best.

Order your custom 165 lb Add-on Kit today.

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165 lbs (75 kg) when added to 75 lbs & 120 lbs QLDB Set


23.5" (59.5 cm) at 165 lbs Size


6.5" (16.5 cm)


6.5" (16.5 cm)

Weight Plates

4 x 22.5 lbs (10.2 kg) plate


4 x custom fully threaded locking screw


Lifetime Warranty


  • Includes 4 x 22.5 lbs (10.2 kg) plates & 4 x extra long FULLY THREADED screws.
  • Same look and feel as traditional dumbbells.
  • High quality cast iron and hand machined weight plates.
  • Takes each dumbbell up to 165 lbs (75 kg).
  • Fully loaded dumbbell is 60 cm long.



Quick-Lock Dumbbell Addon Kit

3 reviews for Quick-Lock Custom 165 lbs (74.8 kg) Add-on Kit

  1. This weight kit is pretty awesome. Would have been easier to order on the site, but placed a phone order easily. The parts look better than the pics and it’s great to have this much weight for those heavy pressing days.

    5 out of 5
  2. Ordered this kit from FitnessNutrition.ca a few months ago. Just as solid as the 120LB upgrade kit. Infinite star rating.

    5 out of 5
  3. Amazing I bought these a while back and they work great.

    5 out of 5
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