Diamond Needle Files

We are offering diamond needle files. 1. Material: high carbon steel 2. Specifications: φ3mm×140mm×5070 φ3mm×160mm×5070 φ4mm×160mm×5070 φ4mm×180mm×5070 φ4mm×180mm×5070 φ5mm×200mm×5070 3. Types: round, half round, square, triangle, flat, oval and rhombic. 4. Application: to be used effectively against extremely hard materials, such as stone, glass or very hard metals such as hardened steel or carbide against which a standard steel file is ineffective.