This Aluminum Hand Grip series was developed for athletes who want to take their grip strength to the next level. These high-quality hand grips are crafted with 25 and 50 pound torque increments from 100lbs to 350lbs, so that you can train your grip similar to training any other body part; by increasing resistance. They are ideal for developing strength and stamina safely, efficiently and effectively while reducing stress at the same time. Great for strength training, sports training, and rehabilitation. The Hand Grips come in several colours. * Colours Vary By Resistance Levels