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Torsion Spring Gripper
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Characterized by a torsion spring set in plastic, aluminum, steel, or even brass handles, this is the most common type of gripper. The gripper is closed by crushing the handles together until they touch, compressing the torsion spring. Difficulty will increase the closer the gripper handles are to touching, so it is important to close the handles until they touch.
High strength gripper with aluminum handles.
Low strength versions of the torsion spring grippers can be purchased at almost any sporting goods store. Most trainees progress to heavy duty versions of these grippers for serious grip training. A variety of manufacturers produce heavy duty torsion spring grippers, the most widely recognized being Ironmind with their Captains of Crush line of hand grippers.
Gripper difficulty will primarily be determined by the diameter of the spring and distance between the gripper handles. Torsion spring grippers typically have a single strength, but are highly portable.
