Professional Allen key socket for commercial or occasional use 4mm impacted Allen key socket Impacted Allen / hex key socket 4mm metric male Allen / hex key 1/2in. Drive so will fit any 1/2in drive ratchet, extension, power bar etc... Manufactured from CR-v steel for maximum strength and durability Impacted so ideal for use with high torque tools such as impact guns Short / stubby Allen key socket so perfect for access in restricted areas SPECIFICATIONS • Allen / Hex key socket • 4mm hex key socket • Male hex key • Impacted • 1/2in drive • Total length – 55mm