The Ironmaster 75 LB Quick-Lock Adjustable Dumbbell Set (IM-75) is your home gym’s bulletproof solution, built like a tank with a patented Quick-Lock system that adjusts from 5-75 lbs (2.2-34 kg) in 2.5 lb increments faster than you can say “gains.” These American-made legends feel like fixed gym dumbbells, with no plastic parts to crack or fail—perfect for home gyms, PT studios, or hardcore lifters. Save space, skip the rack, and lift heavy with confidence.
Why You Need This:
Unbreakable Quality: Chrome-plated steel handles and machined iron plates with a lifetime warranty—no plastic, no worries, drop ‘em if you dare.
Space-Saving Beast: Adjusts from 5-75 lbs in seconds, replacing 15 fixed dumbbells in a 36cm x 48cm footprint, ideal for tight garages.
Real Dumbbell Feel: Patented Quick-Lock screws (US Patent 7,182,716) lock tight for rattle-free lifts, mimicking pro gym gear.
Key Features:
Fast Adjustments: Quick-Lock design changes weights in under 15 seconds with a ¼-¾ turn, hand-machined plates interlock for safety.
29 Weight Options: 5-75 lbs (2.2-34 kg) in 2.5 lb (1.1 kg) increments, marked in lbs and kgs, perfect for micro-loading strength gains.
Heavy-Duty Build: 10 lb starting weight per dumbbell (5 lb handle, 2.5 lb screw), with 24 x 5 lb and 4 x 2.5 lb plates, expandable to 120 lbs with add-on kits.
Compact Size: 6.7” x 14.5” at 75 lbs, 9” at 20 lbs; 1.25” diameter knurled grip with 6.5” width for natural handling.
Versatile Add-Ons: Plates work with Ironmaster Kettlebell Handle, EZ Curl Bar, or Straight Bar for max gym flexibility (sold separately).
Lifetime Warranty: Built for decades of abuse, backed by Ironmaster’s iron-clad guarantee for home use.
Expandable
- Ironmaster Micro Plate Kit Ideal for micro loading dumbbells in the smallest increments!
- Ironmaster Quick-Lock Add On Kit Expand the base kit to 54 kgs.
- Quick Lock Dumbbell 165lb Kit Second addon kit allowing you to push the dumbbell weight to 70 kgs
- Ironmaster Heavy Handle Kit increase the base weight of the dumbbell handle by 15 lbs (6.8kgs)
- Ironmaster Quick Lock Dumbbell Stand – The base dumbbell stand.
- Ironmaster QLDB Stand PRO – PRO Stand with increased loading space and dedicated screw holders.
Josh Coverley –
Absolute quality dumbbells.
Solid construction, no rattling, look amazing, grip extremely perfect knurling.
Was worried changing weights would be slightly annoying but surprisingly fast … and satisfying (might just be me)
At first length of grip ( quite long compared to normal ) felt a bit strange but quickly got used to it. May get the add-on that addresses this.
100% satisfied with the purchase.
Thanks Sam’s fitness and iron master
kunson080327 (verified owner) –
used this for a couple months now and yeah they’re lowk amazing and 100% worth the price.
shipping and tracking was sketch at first, but good communication and they arrived in perfect condition.
if you’re considering which adjustable dumbbells to buy, or if you should buy any at all, these are the correct choice.
(ignore my 3 star one idk why it did that – these are 5, even 6, star.)
Ian –
Loving them. Solid build quality and very quick to change. Might not be as quick as the interlock ones but thread is on one plane so you’re never more than half a turn before quickly pulling out the pin and changing it.
Difference is the solid build quality that sets this apart.
Handles are OK. Not as long as what I’ve seen reviewed on YouTube but not too short it becomes imbalanced. Solid in feel. Can walk into the shop at Banksmeadow to get a proper feel for them.