Cleveland Golf Men's 588 RTX 2.0 Muscle Back Standard Bounce Satin Wedge, Black Deeper grooves and a new micro-milled Rotex face pattern give these wedges the most surface roughness the USGA will allow Forth generation Tour Zip Grooves feature larger walls and sharper radii than ever before Advanced, 2-pass micro milling pattern provides a strategically designed roughness close to the USGA limit Fine tunes the micro-roughness for more consistency and texture across the face