Technical data: Shank diameter: 3.2 mm Working diameter: 9.5 mm Accessories – length: 40.0 mm Width: 10.0 mm Length: 10.0 mm Height: 39.0 mm Maximum rotation speed: 25,000/min. For sharpening, deburring, and grinding most materials, including stainless steel. Use for removing flash from metal castings, deburring metal after cutting, smoothing welds, grinding rivets and removing rust, sharpening lawnmower blades, screwdriver bits, knives, scissors, chisels, and other cutting tools. Use the side of the working tool to achieve the best possible finish when working at an angle. Materials you can machine with the working tool: stainless steel, aluminum, brass, copper. Application: - metal pipes - sheet metal - aluminum - soft metals - brass - hardened steel - gold - silver - stainless steel - cast iron - copper Recommended rotational speed: Aluminum: 15000 rpm Brass 15000 rpm Copper 15000 rpm Package contents: 3 pcs. ** Illustrative photo.