Diamond Needle Files
1. Material: High carbon steel
2. Specifications:
Φ3mm×140mm×50/70 Φ3mm×160mm×50/70
Φ4mm×160mm×50/70 Φ4mm×180mm×50/70
Φ4mm×180mm×50/70 Φ5mm×200mm×50/70
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.