Carbon Steel Material: The file is made of carbon steel material, which has high hardness, is not easy to deform, is wearresistant and durable, and has a longer service lifeElectroplated High Hardness Diamond: Surface electroplated with high hardness diamond, mainly used for trimming details, filing high hardness steel, glass ceramics, polishing tools, removing burrs and burrs, chamfers, etc.Anti Slip Handle: adhesive wrapped handle, smooth and round handle, comfortable to grip. The handle is wrapped with a frosted surface, which is firm and not easy to fall offScope of Use: It can be widely used for shaping and polishing stones, jade, ceramics, walls, metals, saw , glass, wood, and jewelryProduct Dimensions: total length 140mm5.5in, file length 55mm2.16in, handle diameter 3mm0.12inColour:Red & SilverMaterial:DiamondSize: 3x140mmPackage Contents:10x Needles FileOnly the above package content, other products are not included.Note: Light reflection 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 + 13cm.