Interesting product that is designed to give you a strong grip on your pistol, the Prohands Tactical Handgun Grip Trainer is available at their store or on Amazon.com... "We believe that your entire hand, wrist and forearm should be measurably stronger than necessary to operate your handgun. This will allow you to relax your hand and control the weapon with confidence. If your hand is stressed and strained, you will not be operating within your confidence zone.