These colorful hand exercisers are available in 10, 15, 30 and 60 lb. resistances. Large plastic handles feature non-slip rubber grips for a comfortable hold. With just 2 1/2" (64cm) of space between the handles the exerciser can be grasped easily. Hand exerciser measures 4 3/4"x2 7/8"x1 1/8" (12x7.3x2.9 cm)