Detailed Product Description1. Material: 45#Carbon steel, 40CR-V.
2. Surface treatment: Chrome plated/
Mirror polish/matte finish/satin finish/Ni-Fe alloy plated.
3. Torque: Meeting the ANSI standard.
4. Size: 6mm to 22mm, 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8".