Sturdy and durable material: made of quality emery grain, effective grinding effect, fine and even, fine carving, hard texture, durable to serve you for long time. Chainsaw sanding head: can be applied instead of a file, so that your chain will be pointed as before, the chain does not need to be removed when working. Wide application: these burr grinding stone files are suitable for metal polishing like chainsaw, jade, wood, mold, steel, etc. Size detail: each of the grinding head is about 5/32 inch/ 4 mm in diameter, 7/8 inch/ 24 mm in length, and the shank part measures about 3 mm in diameter, total length is approx 46 mm; Mesh :120-150. What you will receive: comes with 50 pieces burr grinding stone files, enough for you to apply in daily life and meet your replacement needs. colour:Silver Package Contents: 50 x Grinding Bits Only the above package content, other products are not included. Note: Light shooting 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.