This 21mm 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 anodized finish they are protected from corrosion and abrasion damage. The 6 point deep socket design with plastic sheath allows for easy reach on wheel fasteners where damage to the wheels is undesirable. This socket is suitable for 1/2" drive ratchets and breaker bars but is not suitable for impact applications. Each socket features a colour coded band to signify size and is backed by Supercheap Auto's amazing lifetime warranty.