Product selling point: 1. The cut teeth are uniform: the lines of the cut teeth are uniformly processed by hand, and the cutting efficiency is high. 2. Bearing steel material: GCR15 bearing steel material substrate features high hardness and toughness, hardness up to HRC60, wear-resistant and durable, not easy to deform 3. Non-slip handle: rubber-coated non-slip handle, surface particle treatment, non-slip comfort, ergonomic design and comfortable use 4. Surface quenching: Surface quenching treatment enhances surface hardness and greatly improves durability 5. A set of files can solve a variety of troubles, and you can choose the width and style 6. Boutique storage bag: Each set of files is equipped with a storage bag, which is convenient for storage 7. Superior performance: good heat dissipation, so that the workpiece surface will not heat up due to overheating, discolor or leave residual glue during grinding Product Specifications: Product name: diamond file Basic material: GCR15 bearing steel Optional Specifications: 5pcs Product advantages: high hardness, durable, not easy to wear Product size: 3*140mm small, 4*160mm medium, 5*180mm large (optional) File Specifications: Scope of application: jade grinding, wood carving grinding, ceramic grinding, metal grinding Pack of 5 includes: flat file, square file, triangle file, round file, half-circle file Scope of application: Grinding and polishing of all kinds of stainless steel/copper/iron/aluminum/plastic and other metal and non-metallic materials, it is a good accessory for surface grinding treatment Handle: plastic wrapping process Instructions for use: 1. Assorted files are made of bearing steel, hard and brittle, and the files are thin. It is strictly forbidden to press down during use to prevent the files from breaking. 2. Use one side of the new file first, and then use the other side when the side is blunt. 3. When filing, always use a wire brush to remove the chips on the filing teeth. 4. The files cannot be overlapped together. 5. After use, it is recommended to remove the chips first and then apply the anti-rust oil, which can prolong the service life. List: Type A 3*140 5-in-1 file*1 Type B 4*160 5-in-1 file*1 Type C 5*180 5-in-1 file*1