Features: Material: this type of socket wrench is made of high-quality steel with heat treatment high hardness and strong torque. Overall quenching: the socket wrench has been heat treated with high hardness and long service life. Universal hexagonal handle: hexagonal handle sleeve can be used for ordinary manual electric drill and pneumatic air screwdriver. Rust-prevention: the surface of sleeve remover is coated with avoid rust oil which can effectively avoid rust. Easy to use: just take out the sleeve and use it in your work a very convenient tool for you. Specifications: Material: Steel Alloy Size: Inner Diameter: 12mm Length: 66mm includes: 1 *Slotted Bolt Socket Wrench