Simple to operate:The grinding bit for chainsaw sharpener is easy to install and features good heat-dissipation, you can apply it to polish without disassembling the chain, which can improve work efficiency. Wide applications:Mainly applied for machinery, bearing, mold, casting parts deep hole, different internal surface, welding spot, welding seam grinding and burr grinding. Specifications: Colour:Silver Material:Emery grain Size:46 x 24 x 4mm Package Contents: 20 * Burr grinding stone file Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.