iheartsynergee Electric Lime Green Hand Gripper - The Best Hand Exerciser Grip Strengthener Adjustable Resistance: 22 to 88 Lbs Ergonomically designed for optimum comfort no matter your hand size! Built with an adjustable resistance so you can increase your strength as you train! Rubber handles keep the gripper in place while you strengthen. Build strength to help with your everyday activities. Our hand gripper builds strength that translates to practical use, like carrying grocery bags or suitcases. The Synergee Hand Grip Strengthener is ideal for helps rock climbers, bodybuilders, golfers, surfers, tennis players, drummers, guitarists, pianists, massage therapists, baseball players and violin players.