Eisenlink Adjustable Square Dumbell, 5pound Increments

Name: Eisenlink Adjustable Square Dumbell, 5pound Increments
Brand: Eisenlink
Rating: 3.61 (6 reviews)

The Eisenlink Adjustable Square Dumbbell is an all-metal, cast-iron adjustable dumbbell built around square, interlocking weight plates instead of a round dial mechanism – the square shape keeps plates from rolling around a garage floor, and a snap-fit locking system holds them tight against each other to eliminate rattle. A single dumbbell adjusts from 10lb up to 50lb or 80lb in 5lb increments (with 2.5lb fine-adjustment plates), and is expandable to 160lb per dumbbell with a separate add-on kit. Reviewers consistently flag it as an affordable, durable alternative to premium twist-dial adjustables like the Nuobell Adjustable Dumbbell Set – the tradeoff being a roughly 10-second-per-side spin-lock adjustment instead of an instant dial change, and weight plates with no printed numbering, so tracking load requires simple mental math.

Handle	~6.9-7 in length, ~35mm (1.37 in) diameter, medium knurling
Material	Cast iron / steel, no plastic components
Warranty	12 months
Increment	5 lb (with 2.5 lb fine-adjustment plates)
Weight range	10-80 lb per dumbbell (50lb or 80lb base sets)
Expandable to	160 lb per dumbbell with separate add-on kit
Assembled length	~14 in (fully loaded dumbbell)
Adjustment mechanism	Spin-lock screw with interlocking square plates, no printed weight numbers

What is a Adjustable Dumbbell?

What adjustable dumbbells are

Adjustable dumbbells replace a whole rack of fixed dumbbells with one pair whose weight you change via a dial, pin, or selector plate. They are the space-and-money saver for home gyms: a single set can span roughly 5–50+ lb per hand. The trade-offs are bulkier handles, a fixed max weight, and a mechanism that can wear or rattle.

What to look for

Fast adjustment (dial or lever beats stacking plates), a wide and useful weight range, a balanced feel that doesn’t clunk mid-rep, and a durable locking mechanism. Many sets include or offer a stand — worth it, since the blocks are awkward to load off the floor.

How it compares

	Eisenlink Adjustable Square Dumbell, 5pound Increments	552 SelectTech Dumbbells	Powerblock Pro 90 Commercial	Sport 24
GymRadar rating	3.61/5	3.46/5	4.0/5	4.11/5
Price		$399.00	$1,649.00	$219.00
Handle	~6.9-7 in length, ~35mm (1.37 in) diameter, medium knurling
Material	Cast iron / steel, no plastic components
Warranty	12 months
Increment	5 lb (with 2.5 lb fine-adjustment plates)
Weight range	10-80 lb per dumbbell (50lb or 80lb base sets)
Expandable to	160 lb per dumbbell with separate add-on kit
Assembled length	~14 in (fully loaded dumbbell)
Adjustment mechanism	Spin-lock screw with interlocking square plates, no printed weight numbers

3.6/5 · 6 GymRadar reviews

Reviews by source

Expert	3.61/5	6 reviews
Youtube	4.25/5	2 reviews

The Eisenlink Adjustable Square Dumbbell is a budget-friendly, all-metal alternative to premium adjustables like the Ironmaster Heavy Handle Plate Kit’s parent system or the twist-dial Nuobell Adjustable Dumbbell Set, trading a slower plate-swap mechanism for a much lower price and a reportedly rattle-free, all-steel build. Value is the standout dimension across every source – Garage Gym Reviews rates it 5/5 for price-to-value and reviewers repeatedly note it undercuts similarly-capable adjustables by hundreds of dollars, with the 80lb set expandable to 160lb per dumbbell via an add-on kit. Functionality is the weakest dimension: the interlocking square plates have no printed weight numbers, forcing manual math to track load, and the spin-lock adjustment takes roughly 10 seconds per side – fine for straight sets, less suited to fast drop sets.

+Value: rated 5/5 for price and value by Garage Gym Reviews, and GymRadar's own value subscore (4.67/5) is its highest of any dimension
+Durability: withstood repeated drops from shoulder height in Garage Gym Reviews' testing without damage; all-metal build with zero plastic parts (Garage Gym Reviews; both YouTube reviews)
+Build quality: interlocking plates and a second locking mechanism keep plates tight with no rattle reported (YouTube: Shredded Dad Garage Gym)
+Versatility: expandable from a 50/80lb base set up to 160lb per dumbbell with an add-on kit, without buying a new dumbbell (Garage Gym Reviews; both YouTube reviews)
+Functionality: adjustment mechanism is faster than similarly-priced competitors, even if slower than a twist-dial dumbbell (Garage Gym Reviews; YouTube: Shredded Dad Garage Gym)

−Functionality: weight plates carry no printed numbering, so users must do mental math to track load (Garage Gym Reviews; both YouTube reviews)
−Functionality: GymRadar's performance subscore is its weakest at 2.83/5, well below its value score
−Build quality: square plate design and handle length feel awkward to some users; handle is slightly longer than an Ironmaster's (Garage Gym Reviews; YouTube: Tim Kamppinen)
−Versatility: not built for fast-paced drop sets -- roughly 10 seconds per side to adjust, versus a twist-dial dumbbell's near-instant change (Garage Gym Reviews; YouTube: Shredded Dad Garage Gym)
−Durability: current manufacturer listing for this exact square 5lb-increment model is only a "used-good" resale page -- the eisenlink.com catalog otherwise shows a newer octagonal 2.5lb-increment version, suggesting this configuration is being phased out as new stock