Captains of Crush Grippers

Captains of Crush Grippers (commonly nicknamed "CoC") is a brand of torsion-spring grippers (a torsion spring fitted with two handles) designed, manufactured and sold by IronMind Enterprises, Inc., based in Nevada City, California. Through IronMind's certification program for people who have officially closed any of the three toughest models (No. 3, No. 3.5 and No. 4), Captains of Crush Grippers have become an internationally recognized measure of world class grip strength.

IronMind founder and president Randall J. Strossen wrote a book in 2003, Captains of Crush Grippers: What They Are and How to Close Them, to address some of the myths and questions surrounding CoC Grippers.

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