SONGMICS Adjustable Dumbbell Set 20 kg

Laid out flat, the set measures 94 cm long by 21.5 cm wide, a footprint of 2,021 cm². That length is enough to run along a wall or at the foot of a bed while all twelve plates and three bars sit out ready for use. The manufacturer does not publish how much space the parts take up once disassembled, so there is no way to work out how it packs away between sessions.

The 20 kg total splits across twelve plates — four at 2.5 kg, four at 1.25 kg, and four at 1 kg — fitted onto two dumbbell bars or the single barbell bar included with the set. Combined, they make two 10 kg dumbbells or one 20 kg barbell, with no step between weights larger than 2.5 kg.

Under the coating, the plates are filled with concrete and sand rather than metal; according to the manufacturer, this keeps them from leaking during use. The bars have a 12 cm grip section with knurling, and four spinlock collars hold the plates in place, both according to the manufacturer. The manufacturer also states the set comes with the tools needed to assemble and disassemble it, matching its note that no separate assembly is required.