Becoming a better tennis player takes lots of work. You not only need to work on your fitness but technique. MaxGripz is a tennis grip trainer that lets you master your tennis grip, so you can hit the ball properly. It keeps your hand in position by applying pressure on top of the V of your hand between your index finger and thumb.
MaxGripz has a silicone backing, so it keeps you comfortable while you practice. Expected to ship in May.