Laser-etched size callouts make identification among other sockets easy.
5mm Impact Flip Socket The STEELMAN 60230 1/2-Inch Drive 6-Point Thin-Wall Impact Flip Socket, 21mm x 21. 1/2" Drive 6-Point Thin Wall 21mm x 21.. Made of durable and hardened chromoly steel which is then given a black phosphate protective coating, this socket is designed to meet or exceed 150% proof of torque under ASME tool performance testing standards.