Captains of Crush® No. 4 Gripper Certification:
Who's Who

Official certification list for the No. 4 Captains of Crush® gripper


  • Joe Kinney
  • Nathan Holle
  • David Morton
  • Tommy Heslep
  • Magnus Samuelsson


Get certified: Rules for Closing and Certification.

Meet our Captains of Crush grippers. Visit the IronMind e-store for CoC® grippers and Crushed-to-Dust! 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.

Captains of Crush Grippers: the gold standard of grippers cocbook-cover_hp