nU Groove Sharpener - Golf Club Groove Sharpener, Re-Grooving Tool and Cleaner for Wedges & Irons - Generate Optimal Backspin - Save Money by Restoring Your Old Irons - PGA Recommended - Made in USA The nU Groove Sharpener by Wedge Guys is the strongest golf club groove sharpener to clean and restore your wedges, irons, and all other golf clubs. With a 4 aluminum handle and non-slip grip, the nU Groove Sharpener is strong enough to clean the grit and gentle enough not to damage your beloved golf clubs. The nU Groove Golf Club Restoring Steel is hardened to 64 on the Rockwell scale. Additionally it is heat treated to gain the hardness level necessary for golf club cleaning. Legally gain higher spin levels and top performance from all of your golf clubs, including brands such as Ping, Titleist, Taylormade, Nike, Callaway, Adams, Mizuno, Cleveland, and more. 100% Satisfaction Guarantee  Were pleased to be able to offer a 30-day 100% satisfaction guarantee with every Wedge Guys nU Groove Sharpener purchase. (Make sure you are purchasing from the Wedge Guys seller store to ensure quality)