Strong and Material: Made of high-quality emery particles, effective grinding effect, fine and uniform, fine carving, hard texture, . Chainsaw sharpening : can be used in place of a file so your chain will be sharpened as before and you 't need to remove the chain when working. Wide range of applications: These burr grindstone files are suitable for metal polishing, such as chainsaws, jade, wood, mold, steel, etc. Size Details: Each grinding is about 5/32inch/4mm in diameter and 7/8inch/24mm long, the shank part is about 3mm in diameter, and the overall length is about 46mm; Mesh: 120-180. Easy to carry and store, enough to use in your and for your replacement needs. Colour: silver Material: emery Package Contents: 30 * 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.