... and the speed of rotation can reach over 12000 R.P.MFUNCTION-Perfect exercise gadget for sports like golf,tennis,squash ... ,cricket,baseball,bowling,basket ball,motocross,mountain climbing.-Increase strength in fingers, wrists,hands,forearms,biceps,triceps,ligament and ... musicians,guitarists, pianists,drummers.-Rehabilitates sore muscles and joints.COUNTER OPERATION-How to startPress the ...