Silverline 18mm Socket 3/8" Drive 6pt Metric 639616

6-point hex socket for maximum torque transfer to the face of the fastener
Precision cold-forged, hardened and tempered chrome vanadium steel
Fully polished and nickel chrome-plated for durable corrosion resistance
Chamfered ends and thin walls for positive location on fastener
Knurled ring gives grip and control in the hand, and bearing hole provides solid connection to the tool.