The GripBoard Proudly Certifies:

 Sean Prince


As Having closed a Mash Monster Elite Gripper (Level 1) with one hand under strict and uniformly ethical and authenticated conditions

The certification is granted by the GripBoard as an independent third party with no ethical or commercial conflict of interest. The Mash Monster Gripper was one of a limited number supplied by, rated and qualified by, and controlled by the Board. This momentous feat was demonstrated before a qualified witness and videotaped to assure it will be valid for historical posterity.


Sean mashes the GripBoard Mash Monster Gripper - Level 1

Name: Sean Prince
Location: USA
Age: 31
Height: 6'1"
Weight: 205lbs
Date of Feat: 04-02-07
Witness: Shawn Roys
Videos (Windows Media): 

Link to Interview on Coming Soon
How Long Grip Training: 2004
Current Grip Training Program: 
Mixed grippers and bending
Other Training Info:
 Jiu-Jitsu, Wrestling Coach
Thank you to all of my training partners and the great members of the Gripboard and Diesel Crew.

Sean Prince, the 37th Man in the World to close a Mash Monster Gripper - Level 1. 



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