SIPYTOPF Golf Clean Tool Set,Flat Sharpener + 6 Heads Golf Club Groove Sharpener,Clean Tool for All Golf Irons (Red)Features: Material:Vacuum heat-treated steel. Size: 6-head groove sharpener:11.2cm x 2.3cm(4.1 x 0.91 inch) Flat groove sharpener:12.5cm x 1.2cm(4.9 x 0.47 inch) Suitable for:U-grooves and V-grooves. Can grind and clean grooves very q..