eddie35, If you give lessons, this product will help you with getting your hitters to feel the proper grip on their bat. I believe SBFAMILY has tried it.
It's called The Bat Jack Grip Trainer. The Bat Jack Grip Trainer - Baseball / Softball Swing Aid Develops Proper Bat Grip For Hitting
It's called The Bat Jack Grip Trainer. The Bat Jack Grip Trainer - Baseball / Softball Swing Aid Develops Proper Bat Grip For Hitting