Improve your technique and reduce bat sting with Franklin Sports' MLB Gator Grip Trainer! Simply slide the thumb on your top hand when hitting (right for righties, left for lefties) through the opening with the rounded side against the natural curve of your hand. Doing this will help move the bat handle towards fingertips to help align your "door knocking" knuckles. By holding the bat in these knuckles, you are able to generate a higher swing speed for better, stronger contact. Plus, the silicon construction can help reduce the sting of the bat on you hand when you get jammed on inside pitches.