Official list of those certified as closing the No. 4 Captains of Crush Gripper 1998 Joe Kinney 2003 Nathan Holle David Morton 2004 Tommy Heslep Magnus Samuelsson

Get certified: Rules for Closing and Certification. On your way to the No. 4 Captains of Crush Gripper, you'll want to get certified first on the No. 3 or 3.5. Meet our Captains of Crush Grippers and our CoC 2 Grip Tools. Find out more about hand strength and training with our Captains of Crush Grippers; and take a look at John Brookfield’s Grip Tips, for over 40 grip training exercises. Return to IronMind’s Grip-Tech hub. 1 | 2 | 3 | 4