X2 Sharpens and re-grooves all wedges and irons back to new condition. Helps add more SPIN! Made from Vacuum Heat Treated A2 Tool Steel, with a maximum hardness of 65 Rockwell. SUPER HARD! 2 different cutting tip ends....Works with both "U" (square) & "V" grooves. 4.25" Long with Ergonomic Foam Rubber Grip. Complies with USGA and R&A rules. This tool will resharpen and re-groove your irons and wedges back to new condition. Helps increase backspin and makes your ball "dance" like the Pro's! With it's custom made foam rubber grip this is a very easy to use and comfortable tool. Comes with the X2 Groove Sharpener, 4 end caps (2 on tool plus 2 extra) and instruction guide. This tool is heat treated at 1800+ Degrees and than tempered for maximum hardnesss and duaribilty. It is made from USA A2 tool steel that is also used by knife and tool makers, very hard and durable with (2) RAZOR SHARP CUTTING TIPS. Can be used to transform "V" grooves into "U" Square grooves for the highest spin rates possible. Precision milled with the latest (EDM) computer controlled machining equipment. This is an awesome tool and I stand by it with a 100% satifaction guarentee.