Enter your model number above to make sure this fits.Plastic Handle， Spring Carbon Steel， Anti-slip StructureERGONOMICALLY: Fit Small to Large Hand Sizes. Perfect for Men， Women， Seniors and TeensFUNCTION: Increase Power for Hand， Wrist， Forearem， Fingers Strength etcFIT FOR: Rock Climbing， Shooting， Bodybuilding， Golf， Tennis， Recovering From a Broken Wrist and Tendon SurgeryPOWER RANGE: 11~44 LBs（5~20KG）Great Fingers Strengthener for Musicians Including Guitar， Piano and Violin Players