Grip Pro Trainers are the ultimate in hand, finger, forearm, and bicep enhancement the rubber circles conform into your hand and as you squease them they actually work out more hand and arm muscles then the regular spring hand grips. Because you are sqeasing with you normal natural squease and push you work out more muscles that are naturally a part of your regular every day squease and hold. Spring hand grips force you to work out muscles that are unnatural to the body.
These Grip Pro trainers are perfect for people in MMA or wrestling because of the natural squease you use they work out your whole hand and arm that are perfect for grappling and pull work.