Baseball Perfect Stride Hitting Training Aid (Solves Stepping Out, Overstriding, Pulling-out & Lunging) Baseball Perfect Stride Hitting Trainers Aid. Helps train to stay square and parallel with the rear foot all the way through the swing. Helps train from hitters opening up the hips and shoulders prematurely, which pulls the head off the ball. Helps with overstriding, lunging to the ball and stepping out. Velcro ankle strap attaches to back foot, and toe strap attaches to lead foot. Fully adjustable with plastic clip for quick removal. Used by Players from Youth Little League to Travel Ball, High School, College & Above