Product details Pair Of Hand Grip Exerciser – Black Heavy Grip Hand Gripper never used, worn or altered and can make your hand more powerful. Safe grip sponge handle fits your hand and give you a best comfort feeling. Great training aids for all martial people and who need to practice his or her hand. Strength Tool Device can be used anytime anywhere and very convenient to take. Heavy Grip can be used anytime anywhere and very convenient to take. Chrome ally steel spring with great tensile force provides you a best Hand Gripper Strength Device