Official list of those certified as closing the No. 3.5 Captains of Crush Gripper 2008 "Tex" Henderson 2009 Gabriel Sum Rich Williams 2010 Jonathan D. Vogt Paul Knight Ioan Cristian Puscasu Sergey Daragan 2012 Vache Sevajian Andrew Durniat

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 60 grip training exercises. Return to IronMind’s Grip-Tech hub. 1 | 2 | 3 | 4 | 5