QUICK-LOCK ADD-ON KIT 120 LBS (54.4 KG)
QUICK-LOCK ADD-ON KIT 120 LBS (54.4 KG)
Don't stop at 75
The Quick-Lock Add-On Kit transforms your existing 75 lb (34 kg) Ironmaster dumbbells into a heavy-duty strength system, boosting each one up to an impressive 120 lbs (54 kg). No need to replace your equipment or start over with a new set. Just expand what you already own and keep pushing your limits.
Click For Features
Click For Features
- Adds 45 lbs (20 kg) per dumbbell (up to 120 lbs / 54.4 kg each)
- Includes 4 x 22.5 lb (10.2 kg) plates + 4 x longer Quick-Lock screws
- Compatible with Quick-Lock Dumbbells & Kettlebell system
- Patented Quick-Lock design for fast, secure adjustments
- Precision-machined interlocking plates for stability
- Lifetime warranty
Couldn't load pickup availability
SKU 120
View full details

What Our Customer Says
Reviewed by lifters who’ve put the QUICK-LOCK ADD-ON KIT 120 LBS (54.4 KG) through real workouts
-
Jake wrote on https://ironmaster.co.uk★ ★ ★ ★ ★I've had the standard set of Ironmaster dumbbells for just over a year and couldn't be happier… until the day I needed extra weight! I ordered the 120 lbs add on kit and waited in excitement for them to arrive. 2 days later they were there ready to be lifted. Let me say this, the packaging is very, very good. But I soon had it off and I was ready to roll. The add on kit is basically 4 longer locking screws and (more importantly) 4 larger weight plates. Everything was perfect and now I can't wait until I need the 165 lbs add on kit. It might be a while though! -
Steff wrote on https://ironmaster.co.uk★ ★ ★ ★ ★I just recently purchased the add-on kit for the dumbbells. They are the same excellent quality as the starter set. Don't be fooled into buying cheaper alternatives, these will last forever! -
William wrote on https://ironmaster.co.uk★ ★ ★ ★ ★Perfect addition to the 75 pound dumbbell pair. If you're going to be doing bench press this is an awesome option to have. I don't believe that I'll need to go higher in weight but if you do they have a 165 pound add-on kit which is pretty amazing. I love my extension kit and use it on my leg developer which hooks on to my super bench perfect for fast change outs while doing leg extensions and leg curls. I love the products and absolutely recommend them to anyone wanting to build a gym.
FAQs: QUICK-LOCK ADD-ON KIT 120 LBS (54.4 KG)
Do I need the Quick-Lock Dumbbells Set to use this kit?
Yes, this is an add-on kit only and requires an existing Ironmaster Quick-Lock Adjustable Dumbbell Set. It is designed to attach to your current Quick-Lock Dumbbell system and extend each dumbbell up to 120 lbs (54.4 kg).
Can I adjust weights gradually or is it all-or-nothing?
You can fully customise your weight by combining existing plates with the add-on plates for gradual progression.
Are the heavier dumbbells still compact?
Yes, even at 120 lbs (54.4 kg), each dumbbell remains compact at approximately 18.25" (47 cm) in length.
Will the locking screws stay secure during heavy lifts?
Absolutely, the patented Quick-Lock system ensures the screws stay tight and secure throughout your workout.
QUICK-LOCK ADD-ON KIT 120 LBS (54.4 KG)
Massive Strength Upgrade
This kit adds 45 lbs (20 kg) per dumbbell, bringing your total up to 120 lbs (54 kg) each. It allows you to continue progressing without needing a completely new set of weights. Ideal for serious lifters pushing beyond intermediate limits.
Patented Quick-Lock System
The longer locking screws secure plates with just a quick quarter to three-quarter turn. Weight changes are fast, simple, and reliable so you can stay focused on your workout. No tools, no hassle.
Precision Interlocking Plates
Each plate is precision-cast and hand-machined to interlock seamlessly. This design prevents shifting or disengagement during use, giving you a stable and controlled lifting experience even at maximum weight.
Compact Yet Heavy-Duty Design
Despite the added weight, the system remains compact and balanced. The square plate design allows comfortable thigh support when setting up lifts, while maintaining full range of motion during exercises.
Built for Lifetime Use
Constructed with high-quality materials and backed by a lifetime warranty, this add-on kit is built to last. It integrates seamlessly with your existing Quick-Lock system, ensuring long-term performance and expandability. Backed by our Ironmaster lifetime warranty.
Please Note: This is an add-on kit only and requires compatible handles to be used. It attaches to the Ironmaster Quick-Lock Adjustable Dumbbell Handle Set or the handles included with the 75 lb or 45 lb Quick-Lock Adjustable Dumbbell sets.
Sign up to the Ironmaster newsletter!
Be the first in line for new product launches, exclusive subscriber-only offers, expert training tips and the latest Ironmaster news. No spam, just serious strength.
Add on lot to 120#
This kit is Great! Easy to use and I have more weight to play with
More Dumbbell Weight Than Gyms Near Me
The original 75 pounds per dumbbell got the job done, but I always knew I would get the expansion kit when it was more available. It makes loading weight for 55 pounds and above so much easier. Putting on the big 22.5 pound weights saves time and it's quicker to go up from there. Going between 75-120 pounds for presses, RDLs, etc., opens more progression and feels sturdy when using the heavier weights. Most gyms near me only have dumbbells up to 100 pounds so being able to go above that is so convention. Will definitely have to get the 165 expansion kit one day.
Quality materials
These weights match up to each other very well and are well made. I can definitely foresee these screws and weights lasting a long time
Makes life easier
The 22.5lb plates make loading up the kettlebells so much easier. Also love doing farmer carries with the dumbbells and heavy handle kit with these. Quality product as always. Thanks.
- 5 stars: 24 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
Five Stars. Works as advertised, same quality as base pieces.
Great add-on kit for the greatest adjustable dumbbells on the planet. Rock solid. Infinite star rating.
It just adds more flexibility to the rest of my product. I am thinking of adding some more dumbbells to make setup quicker though. I might have an extra set to just have these heavier weights already attached so I don't have to worry about moving them on and off so much.
I just purchased the add-on plates to take each dumbbell up to 120lb and I'm just as happy with this purchase as I am with the original 75lb kit. The larger plates do make it quicker to stack up to moderate and heavier weights.
LOVE the 120# Add-On Kit for QLDBs. I've been waiting forever because of the COVID issues but it was worth it - this made my year! Worked out last night - now I have a complete weight range for anything. Since I have two pairs of the QLDs - I can make one go past 50 and the other pair go lighter. Have extra 5# to make it work. Amazing product - this is top-gym on-par excellence for the money. Love the ruggedness and feel. You guys rock - I can't say enough great things about you!
I have their adjustable dumbbells. The design is genius. They feel like actual dumbbells you use at the gym, yet adjustable. There are no cheap plastic parts and are solid as a rock. I highly recommend them to all my friends who are in the market for adjustable dumbbells.
Check your ego
This is probably the max most men will ever need! Like the 75 sets, these have a high build quality and are very durable and accurate. Perfectly made to allow you to add more weight with less hassle or stripping down to just the handles. If you plan to get strong these are a nice addition.
Perfect addition
Perfect addition to the 75 pound dumbbell pair. If you’re going to be doing benchpress this is an awesome option to have. I don’t believe that I’ll need to go higher in weight but if you do they have 165 pound ad on kit to which is pretty amazing. I love my extension kit and use it on my leg developer which hooks on to my super bench perfect for fast change outs while doing leg extensions and leg curls. Love the products and absolutely recommend them to anyone wanting to build a gym.
LOVE the 120# Add-On Kit for QLDs
I've been waiting forever because of the COVID issues but it was worth it - this made my year! Worked out last night - now I have a complete weight range for anything. Since I have two pairs of the QLDs - I can make one go past 50 and the other pair go lighter. Have extra 5# to make it work. Amazing product - this is top-gym on-par excellence for the money. Love the ruggedness and feel. You guys rock - I can't say enough great things about you!
Not just for Dumbbells
The Quick-lock family of products is really well thought out and a great space and money saver. These are high quality products and I never worry about dropping them too hard. The add on kit increased the dumbbell weight to as much as I will ever need. But it also increased the kettlebell weight (due to the longer locking screws). Great overall system.
Add on Kit to 120 LBS For Quick- Lock Dummbells
I Absolutely love the Add on kit for my Ironmaster Dummbell set. I now have the ability to go from a set of 5 lbs-120 lbs set of dummbells. So simple and so much space saving for my basement gym. Highly recommend for those that need extra weight to add to their training regime.
Moar Powah
Yup, these do the thing. Pretty awesome being able to have 120lb DBs to grow into while so many other adjustable DB companies cap you around 90lbs. They're also super secure and have 0 rattle while you move them.
120lbs add on kit
Excellent quality and fast shipping. Thank you.
Hit the Lottery...
After entering several Ironmaster Lotteries, I finally hit the jackpot. The 120 pound add-on kit completes my home gym. This is a great product, and now it's now super easy to get between 75 and 120 pounds for some heavier benching or some Kroc Rows. They feel great, and they are durable. I've dropped mine a few times after a set (onto a rubber mat), and they are rock solid. The best part is being able to have what amounts to a full set of dumbbells in a compact space. Changing weight is still very easy. But I have two sets of handles for even quicker drop sets... which is really nice. This is a must have.
Excellent quality as expected
Like all Ironmaster products, these deliver on high quality.
My dumbells now are heavy enough for everything I can handle, no complaints!
Makes life easier
The 22.5lb plates make loading up the kettlebells so much easier. Also love doing farmer carries with the dumbbells and heavy handle kit with these. Quality product as always. Thanks.
Quality materials
These weights match up to each other very well and are well made. I can definitely foresee these screws and weights lasting a long time
More Dumbbell Weight Than Gyms Near Me
The original 75 pounds per dumbbell got the job done, but I always knew I would get the expansion kit when it was more available. It makes loading weight for 55 pounds and above so much easier. Putting on the big 22.5 pound weights saves time and it's quicker to go up from there. Going between 75-120 pounds for presses, RDLs, etc., opens more progression and feels sturdy when using the heavier weights. Most gyms near me only have dumbbells up to 100 pounds so being able to go above that is so convention. Will definitely have to get the 165 expansion kit one day.
Add on lot to 120#
This kit is Great! Easy to use and I have more weight to play with
Damn these are good!
Once these bad boys are added onto the regular iron masters, you have weights going from 34-54kgs!
Super solid, super heavy and a very worthy investment.
This is an essential addition to the standard dumbbell kit. The dumbbells are excellent. Tough, good grip, no fear of break in case of a drop, fast change of weights. Best design at the best price. The seller is fast, friendly and very helpful.
Just recently purchased the add on kit for the dumbells. They are the same excellent quality as the starter set . Don't be fooled into buying cheaper alternative, these will last forever! The Valley Fitness service is brilliant too!.
I've had the standard set of Ironmaster dumbbells for just over a year and couldn't be happier... until the day I needed extra weight! I ordered the 120 lbs add on kit and waited in excitement for them to arrive. 2 days later they were there ready to be lifted. Let me say this, the packaging is very, very good. But I soon had it off and I was ready to roll. The add on kit is basically 4 longer locking screws and (more importantly) 4 larger weight plates. Everything was perfect and now I can't wait until I need the 165 lbs add on kit. It might be a while though!
The Ironmaster dumbbells are an excellent addition to any home gym. Good grip and easy change of weights. Valley Fitness were quick to respond to any questions and resolve any issues I had.