"Tour Lock Pro Grip Modifier, TLP 3/16"" Installation Wrench and Plastic End Cap.The Tour Lock Grip Modifier is a necessary tool for modifying the butt end of a golf grip to accept the Tour Lock internal counter weights. Used with a hand drill to quickly cut a precise hole in the butt cap of a golf grip for easy installation.The TLP 3/16"" installation tool allows you properly secure the Tour Lock Plus weights into the golf shaft."