These attractive dumbbells have contoured knurled chrome handles & durable rubber covered heads for increased safety & comfort Torque threaded & permanently affixed to a thick 35mm solid steel shaft improving the strength of the head/handle joint Knurled chrome handles are ergonomically contoured to fit comfortably in the users palm The thick rubber coating increases durability, protects equipment & flooring & diminishes noise 1- 35kg in 1kg. increments up to 10kg & 2. 5kg increments from 10kg onwards These are for light commercial usage only.