Carbon Steel Material: The file is made of carbon steel, offering high hardness, resistance to deformation, and excellent wear resistance for long-lasting durability. Electroplated High Hardness Diamond: Surface coated with high-hardness diamond particles, ideal for precision filing, shaping hard materials such as steel, glass, ceramics, tool polishing, deburring, edge finishing, and chamfering. Anti-Slip Handle: Smooth, round handle with a textured frosted surface for a secure and comfortable grip. The adhesive-wrapped design ensures durability and prevents slippage. Scope of Use: Suitable for shaping and polishing various materials including stone, jade, ceramics, metal, glass, wood, walls, and jewelry. Product Dimensions: Total length 140mm (5.5in), file length 55mm (2.16in), handle diameter 3mm (0.12in) Color: Red & Silver Material: Diamond-coated carbon steel Size: 3x140mm Package Contents: 10 x Needle Files Note: This package includes only the items listed above. Other accessories are not included. Due to lighting reflections and display differences, the actual color may vary slightly from the image. Measurement tolerances may vary by ±1-3cm.