1. Material: alloy steel
2. Specifications: 0.7mm/0.9mm/1.3mm/1.5mm/2mm/2.5mm/3mm
3. Made of SAE6150 chrome vanadium steel, special hardening treatment, wear resistance, long service life
4. Black surface treatment, high strength, high toughness, not easy to rust, and good oxidation resistance.
5. Widely used to drive hexagon socket (hexagon head) fasteners.