This 18mm single socket by ToolPRO is an ideal addition to any socket set. Made from high quality durable chrome vanadium steel and finished in a high polish easy to clean finish they are protected from corrosion and abrasion damage. The 12 point socket design allows for easy and damage-free removal of fasteners. This socket is suitable for 1/2" drive ratchets and breaker bars but is not suitable for impact applications.