This stone file is suitable for surface graining, polishing, etc. of various materials such as metal, stainless steel, steel, copper, wood, and plastic. These diamond chainsaw sharpeners are widely used for grinding saw teeth, glass, jade, models, bearings, machinery, and metal rust removal.Specification Color: SilverMaterial: DiamondGrinding Head Size: 22 x 4.8mm / 0.87 x 0.19 inch(L*D)Shank Diameter: 3mm / 0.12 inchTotal Length: 45mm / 1.77 inchPacking List: 16 x Sharpening StonesAdvantage1. These chain saw sharpeners are forged with diamonds, they adhere tightly to the surface and are not easy to fall off. The particles are full and evenly distributed, which ensures the stable and efficient grinding of the chainsaw, and is hard and not easy to wear.2.