Callaway Men's Mack Daddy 3 Black C-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 C-Grind: Designed for firmer conditions and versatility around the green. The heel and toe relief allow for a number of shots, especially opening up the face and keeping the leading edge low 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 Advanced Shaping and Design: Legendary Callaway wedge designer Roger Cleveland took Tour input and blended that with advanced CAD design. The result is a balanced wedge with a high toe profile and a semi-straight leading edge Advanced Weight Ports: The weight ports in the back of the wedge gave us the freedom to reposition the weight for better shot-making, especially out of deep rough