3 grinds for every shot every condition and every swing weve developed 3 unique grinds to suit the shots you hit the courses you play and the swings you make its the versatility and selection you need to get up and down from anywhere s grind our most versatile option its 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