"These colorful, spring-loaded hand exercisers are available in 10, 15, 30 and 60 lb. (4.5, 6.8, 14 and 27kg) resistances. Large plastic handles feature non-slip rubber grips for a comfortable hold.With the handles spaced just 2 "" (6.4cm) apart, the exerciser can be grasped easily. Hand exercisers measure 4 "" x 2 "" x 1 "" (12 x 7.3 x 2.9cm)."