The Lock and Load Swingtrainer is a one of a kind muscle memory baseball/softball swing trainer. It was designed to teach all hitters the proper mechanics of the swing from the load to follow thru. It gives the hitters instant feedback and lets them know when they have done it correct or incorrect. It will eliminate several major swingflaws, including: wrapping the bat, lunging and drifting, dropping the back shoulder, flying open early and pulling off the ball. A must have for the serious ballplayer. An extra coach at home and at the ballfield !!!!!