Carbon Steel Material: The file is made of carbon steel material, which has high hardness, is not easy to deform, is wear- and , and has a longer service life Electroplated High Hardness Diamond: 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 , which is firm and not easy to fall off Scope of Use: It can be widely used for shaping and polishing stones, jade, ceramics, walls, metals, saw blades, glass, wood, and jewelry Product Dimensions: total length 140mm/5.5in, file length 55mm/2.16in, handle diameter 3mm/0.12in Colour:Red & Silver Material:Diamond Size: 3x140mm Package Contents: 10x Needles File Only 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 +/- 1-3cm.