A high-quality diamond file set specially designed for hard-to-reach odd- objects; Super hard industrial diamond permanently embedded in the steel tip for material removal; Shape aids for deburring, fixing broken glass, , tiles, ceramics and professional applications Diamond file is a kind of file, which is electroplated with emery (emery is silicon carbide, hardness 95. It is composed of carbon and silicon by a covalent bond, no diamond is hard, and no diamond is expensive). It is a professional processing tool, quenched Cemented carbide, and gears. It is characterized by high precision, the use of diamond files does not have the diagonal of general tool steel files, and theoretically no loss. This product is made of high-strength diamond and high-quality substrate electroplating. It is sharp, wear-resistant, high-strength, and has good properties, strengthening and wear resistance. Widely used in molds, models, parts, handicrafts and other industries, such as: grinding, polishing, engraving, cutting, drilling, correction of jade, ceramics, glass, crystal, metal, hard alloy and other parts. The diamond file can file anything, it can shake any turning plate, even the mysterious high-speed steel with a hardness of 69, it cannot be used to repair shapes. It can only be used to repair details. When using it, the file is along the edge of the blade. The direction can and file a edge . Hardened cemented carbide, high-hardness steel, ceramics, glass, etc. are perfect tools for the production and processing of workpieces in industries such as bearings, molds, and gears. specification Name: Diamond File Colour: silver + red Material: alloy steel Size: 10x3x140mm Package Contents: 10 * file elbow Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.