AmStaff Adjustable Dumbbell 3-40LB
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Thousands of 5★ Reviews
12 Calibrated Weight Increments
Twelve levels from 3 to 40 lbs give you tight enough jumps for real progressive overload across every lift, from lateral raises to heavy rows.
One-Second Twist Adjustment
A single turn of the end dial changes your load in one second, fast enough to keep supersets and drop sets moving without breaking rhythm.
Dock-Based Lock-Tight Safety
Plates release only while the dumbbell sits in its tray and lock mechanically the moment you lift it out, so the selected weight never shifts mid-rep.
Ergonomic Contoured Grip
The contoured handle centers the load in your palm and keeps the balance point neutral through overhead pressing and unilateral work.
Space-Saving Footprint
At 16 x 8 x 8 in, one dumbbell replaces an entire rack reclaiming roughly 90% of the floor space a traditional set demands.
Premium Performance & Feel
Engineered with machined steel-core plates and smooth mechanical tolerances, giving you the balanced, solid feel of traditional fixed weights alongside the efficiency of an adjustable system.
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Product Dimensions (L x W x H)16 x 8 x 8 in / 40.6 x 20.3 x 20.3 cm
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Weight Range3 - 40 lbs / 1.4 - 18.1 kg
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Number of Weight Increments12
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Weight Increments3, 7, 13, 14.5, 17, 20, 24, 27, 29, 31, 36, 40 lbs / 1.4, 3.2, 5.9, 6.6, 7.7, 9.1, 10.9, 12.2, 13.2, 14.1, 16.3, 18.1 kg
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Adjustment TypeSingle-dial twist selection, 1 second
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Locking SystemDock-based lock-tight — plates adjustable in tray, locked out of tray
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GripContoured ergonomic handle
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IncludedAdjustable dumbbell and docking storage tray
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Sold AsSingle or Pair
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Warranty1 Year (Home Use)
- Quality
- Adjustability
- Design
- Usability
- Value
- BDBryan D. C.Verified BuyerReviewingAmStaff Fitness 3-in-1 Adjustable Dumbbell/Kettlebell/Barbell Set (2-43lbs)I recommend this productRated 5 out of 5 stars1 hour ago3 in 1
My son loves the swt
- HBHadrien B.Verified BuyerReviewingAmStaff Adjustable Dumbbell 3-40LBI recommend this productRated 5 out of 5 stars5 months agosuper conviennent even for strong lifters
Bought a set, they are very easy to use, the rubber grip is good, they are not too bulky, and all of this is considering the low price this pair sells for.
40lbs can get low for certain exercises for strong lifters, but in that case it is still very very convenient for the warmups, otherwise it's plenty heavy for a multitude of other exercises.
They are still new but they work well.
- JTJed T.Verified BuyerReviewingAmStaff Fitness 3-in-1 Adjustable Dumbbell/Kettlebell/Barbell Set (2-43lbs)I recommend this productRated 5 out of 5 stars7 months ago3 in 1 adjustable
Compact, sturdy, and convenient for quick weight adjustments
- JTJed T.Verified BuyerReviewingAmStaff Adjustable Dumbbell 3-40LBI recommend this productRated 5 out of 5 stars7 months agoAdjustable Dumbbell
Great build and smooth weight changes. Perfect for home workouts.
- FFredVerified BuyerReviewingAmStaff Adjustable Dumbbell 3-40LBI recommend this productRated 5 out of 5 stars8 months agoGreat Quality and Convenience
Buying these dumbbells was an excellent decision, especially considering the limited space in my apartment. They are very convenient to use, well-made, and save a lot of space without compromising the quality of my workouts.
