steel: the screwdriver is from steel, with good selection and durability Anti skid handle: screw driver anti-skid handle, the overall molding is not loose The handle has anti-skid design, which doubles the anti-skid effect Rust proof set: this screwdriver set adopts which will avoid rust well Tail opening: the tail opening design of the screwdriver handle is for hanging and storage When the force is insufficient, it can pass through from here to form a borrowing force Powerful: the newly upgraded screwdriver head ' s force is doubled, which is several times that of ordinary screwdriver head, Manufacturer: CRFFZ