Product Overview: The Club Medic revives worn out grooves and reforms them within USGA standards to provide optimum spin and ball control. The utility knife-like handle provides a comfortable and secure grip for easy handling and sure groove cutting. To use, lock the iron clubhead in a vise face up. Then simply push and pull the Club Medic back and forth along each groove. With just a few repetitions, each groove is cleaned and reformed to provide enhanced ball spin. Features: Not intended for use on metal woods or titanium-face irons.