[7] Despite five other men (Nathan Holle, David Morton, Tommy Heslep, Magnus Samuelsson and Carl Myerscough) have managed getting certified on this gripper since then, Kinney did it in a slow and steady paced manner that has never been replicated.
[1] In 1999, he became the first man to close the IronMind Captains of Crush No.3 gripper (127 kg (280 lb)/ RGC 149 of pressure) using only two fingers.
[8] Some of Kinney's crush grip innovations include performing extra heavy negatives (severe negatives) and wrist rolling, and training with the long handled Monster gripper, floor-model gripper and 'Secret Weapon' grip machine.
[7][9] He also advocated on heavy high rep squatting as a building block for hand and grip strength.
[3] Along with Randall J. Strossen and Nathan Holle, Kinney co-authored Captains of Crush Grippers: What they are and how to close them.