1. Material:  45#Carbon Steel,40CR,40CR-V

2. Surface Treatment: chrome plated mirror polish,matte finish,satin finish and Ni-Fe alloy plated

3. Torque: meeting the ANSI standard

4. Size: 6mm--22mm;1/4", 5/16",3/8",7/16",1/2",9/16",5/8",11/16",3/4",13/16",7/8"

5. Payment: L/C or T/T

6. Delivery: in 30-45 days or according to your order quantity