This 12mm thread spark plug socket with 1/2" square drive and 18mm hexagon is designed for standard automotive spark plugs, making it the most commonly required size for everyday vehicle servicing. The 12mm thread specification suits the vast majority of petrol engines in cars, vans, and light commercial vehicles. The 6 point deep socket design ensures positive engagement with the spark plug hexagon, whilst the protective rubber insert safeguards the ceramic insulator from damage and securely retains the plug during removal. Manufactured from chrome vanadium steel that's been hardened and tempered, this socket delivers professional-grade durability. The chrome plated and polished finish provides excellent corrosion resistance for long-term reliability. At 65mm in length, it offers versatile access to spark plugs in various engine configurations, whilst the knurled ring ensures a secure grip during use. Features and Benefits: • Rubber insert for plug protection and retention • Chrome vanadium steel hardened, tempered, chrome plated and polished • Length 65mm Contents: • 1 x 12mm Thread 6 Point Spark Plug Socket, 1/2" Sq. Dr., 18mm