The material for hand tools is Carbon steel . CR-V ,40CR ,etc . The surface for socket includes mirror finish ,matte finish ,satin nickekl finish depend our customer's requirements . Our products reach ANSI and DIN standard . We have our cooperative company who produce the socket tools for more than 10 years . We have been doing the OEM and ODM for many years and export to Southeast Asia and Middle East area and Africa market . The competitive prices and good quality has been acknowledged by our customers from all over the world .