... ctndimension55*30*31cmfinger power5kg,10kg,15kg,20kg,25kg,etcN.W/G.W8.46kg/13.75kgqty/20GP7,920pcsqty/40GP15, ... to request 1,Strengthens each finger individually2,Available in 4 graduated resistance levels, finger power:5kg,10kg,15kg,25kg ... meet different requirement3,Ergonomically designed palm and finger grips4,Dramatically increases hand, palm,finger,wrist and forearm strength5,Increase control, ...