Professional socket for commercial or occasional use 20mm metric deep impact socket Metric socket 1/2" drive so will fit any 1/2"drive ratchet, bar, impact gun etc... Manufactured from CR-v steel for maximum strength and durability Hardened and tempered for added strength with phosphate finish for greater corrosion resistance Impacted socket so suitable for use with high torque tools Single hex / 6 sided socket 20mm metric socket Total length of the socket – 75mm Total inner depth of the socket – 30mm