SMARKING GRINDER: the head whetstone is made of high quality emery, which will not melt at any known temperature, so even under the heat due to high speed rotation and grinding, the frosted part of the head whetstone has no changes, strong and stable. You will receive: product you will receive a sharpener with a size of 45 mm x 4.0 mm, different sizes can meet the different needs of your daily life. High hardness: the burr file has a high hardness and can be used for polishing metal, especially for steel parts after heat treatment. It is an ideal tool for grinding electric saws, and it is even more labor-saving than traditional grinding tool. UNIVERSAL INSTALLATION DESIGN The bottom diameter of the burr file is 3mm, which can be installed on most electric saw grinders or others rotating tools. It can be used to replace worn or damaged grinding tools to make your tools work again. Wide range of applications: rotary carving tool accessories can quickly remove burrs on the surface of the object and polish and polish the surface of the product. They can be applied to wood, metal, mold, glass and jewelry.