1 Pro-Style Diamond insert: High-impact Diamond insert provides ball stopping control that all golfers will enjoy; Tiny diamond particles embedded on the insert surface preserves the precise roughness for consistent performance and spin; U-Grooves that have been manufactured to conform to USGA specifications * 3 Reverse Groove inserts: Give you 250%-400% more backspin instantly; Insert simply reinforces proper ball striking by putting the "fun" back into the short game fundamentals; Not approved for USGA tournament play * Investment casting * Classic shape profile wedge head * Satin finish