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Ironmind
http://www.ironmind.com
- Publisher of both the Grip Master's Manual and Mastery of Hand Strength, Ironmind is one of the premier vendors of grip training tools. Most notable are the Captains of Crush heavy duty hand grippers and the bag of nails. Close Ironmind's #3 or #4 gripper, or bend their Red Nail, and you will be in the company of a select group of very strong men.
