The Bumper

Have you ever wished you could bump up the resistance on almost any gripper?  Cannon PowerWorks developed The Bumper with recommendations from a spring manufacturer. Used properly, it will safely add 1 to 7 pounds of resistance to almost any gripper. The added resistance comes from soft, natural rubber, which will not damage the gripper spring. Our extensive testing has proven the durable rubber will last for thousands of reps. This innovative and exclusive new product is a must-have for anyone training to close heavier grippers.  The Bumper will fit all IronMind Captains of Crush, Standard, GHP, Grip Genie and Heavy Grips grippers. Some other grippers have too small or too large of a coil diameter to insert The Bumper. If you have a question about compatibility, email info@cannonpowerworks.com.     How it works:  Center the rubber within the spring coil. Then, to get the initial fit set correctly, tighten the knob in half turns until The Bumper is held in the coil. You should be ab