Callaway Mack Daddy 3 Chrome S-Grind Wedge 3 grinds for every shot, every Condition and every swing: we've developed 3 unique grinds to suit the shots you hit, the courses you play and the Swings you make It's the versatility and selection you need to get up and down from anywhere S-grind: our most versatile option It's great for a wide range of conditions (Normal, soft or firm), shot types and Swings (moderate to sweeping attack angles) Progressive groove optimization: the MD3 milled line has progressive groove optimization - a 3 groove package milled into the Face of these wedges that optimizes spin as you Go up in loft It creates a smoother spin transition from your irons to wedges