BB 911 Adjustable Hand Clamps Clamps are designed for exercising the muscles of the hands and forearms. They are also used in finger and hand rehabilitation. They are also used in the treatment of joint and muscle disorders through the mechanical repetition of various movements. Description: the clamps are made of the highest quality plastic combinations, which ensures durability and resistance to damage to ensure comfort, they are finished with comfortable, ergonomic handles 3 levels of resistance adjustment