Spin Doctor Wedge - Steel Shaft High-impact Tungsten inserts provide ball stopping control that all golfers will enjoy; Tiny Tungsten Carbide embedded on the insert surfaces preserve the precise roughness for consistent performance and spin; U-Grooves that have been manufactured to conform to USGA specifications. 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. Steel shaft. Wrapped grip. 52 degree Pitching Wedge, 56 degree Sand Wedge, 60 degree Lob Wedge. Patented design. You will be amazed at how you spin it back like the pros green after green. This insert simply reinforces proper ball striking by putting the "fun" back into the short game fundamentals. Spin Doctor guarantees you'll spin it like the pros with this insert; Just get down on the ball and watch it spin back!.