Dark Horse Golf Club Groove Sharpener and Cleaner Tool with 6 Heads PACKAGED IN CLEAR PLASTIC SAFETY TUBE FOR EASY STORAGE and shipped inside protective foam bag for ultimate cover protection in golf accessories. HIGHEST QUALITY METAL CONSTRUCTION, made from high grade precision tool vacuum heat treated steel, measuring 60 on the Rockwell hardness scale, for maximum durability and cutting effectiveness. Precision ground and engineered to exacting tolerances to ensure that it does not compromise USGA rules regarding groove width and depth. 6 CUTTER HEADS WITH TWO DIFFERENT CUTTING TYPES, 3 for U type club grooves and 3 for V type grooves. PERFECT FOR ADAMS, CALLAWAY, COBRA, CLEVELAND, NIKE, PING, TAYLORMADE, TITLEIST, WILSON, and other Leading Irons, including Sand Wedges, Lob Wedges, Gap Wedges, Approach Wedges, and other Golf Utility Clubs. Entry-level model to the brand's new replacement model, the "GROOVEMASTER Adjustable Golf Club Groove Sharpener with Large Rubber Grip". Official branded USER OPERATING MANUAL provided electronically upon order shipment but ONLY if ordered from 5 Star Brands. IMPORTANT: Unapproved sellers do not offer complete product, packaging, instruction manual, or customer service of products under the Specialty Golf Products brand. If it isn't sold by 5 Star Brands, it isn't authentic.