DESIGN: Multi-material construction of varying densities (17-4 SS, tungsten, aluminum) increases MOI and optimize CG for greater forgiveness Dual-durometer insert with a softer front layer of Pebax for precision on shorter putts and a firmer back layer for distance control Shallow, uniform grooves across the face combine with dual-durometer insert to provide a soft feel and consistent roll PP58 MID GRIP: Standard-sized pistol shape designed to help square face at impact Rubber construction Weight: 87g