How does urethane compare with rubber or iron?

Urethane is denser and tougher than rubber, so it resists cuts and doesn't give off the rubber smell. Unlike iron, it won't chip paint or dent floors as easily.

Why 12 sides instead of round?

The flat faces keep the dumbbell from rolling across the floor or off a bench between sets. Round heads roll; these stay put.

What does the medium knurl feel like?

It is a middle-depth knurl: enough texture to hold heavy presses without tearing calluses. Lifters who prefer aggressive knurling may find it mild.

Are these safe to drop?

The urethane head and welded sleeve are built for gym use, but urethane is hard. Drop them on rubber flooring, not concrete or tile.

Can I buy single weights or only sets?

The line is offered in sets running in 5 lb increments, one dumbbell of each weight per set. Check the set contents before ordering if you need pairs.