Material: Our chainsaw sharpening stone is made of high-quality Emery and titanium plating process,it sharpen faster and last longer than any traditional steel sharpener. Easy To Use: The chainsaw sharpener is easy to install,polishing without dismantling the chain,reducing the number of chain replacements,saving time and labor,and improving work efficiency. Wide Usage: Widely used in machinery,bearings,metal polishing,chain saws,molds,jade,wood,etc.,can effectively grind,the texture is hard,and it is not easy to break. Applicable objects: Diam 5/32 inch (4.0mm),used for sharpen chainsaw chains such as small 3/8 inch,1/4 inch chainsaw chain and other smaller blade., Weight: 0.0771617917 Pounds, Manufacturer: ximie