This 14mm thread spark plug socket with 21mm hex is designed for larger capacity engines, including many 4x4 vehicles, performance cars and heavy-duty applications. The 14mm thread size is widely used across American and European manufacturers, making this an essential socket for comprehensive automotive servicing. The 6-point deep socket design incorporates a rubber insert that safeguards spark plug ceramics from damage whilst providing secure retention throughout the removal and installation process. Manufactured from premium chrome vanadium steel that's been hardened and tempered, this socket delivers exceptional strength and durability for demanding workshop environments. The micro satin chrome finish offers superior corrosion resistance and the knurled ring ensures positive grip even with oily hands. At 65mm in length with 3/8" square drive, this socket provides excellent reach into deep engine compartments where larger spark plugs are typically located. Features and Benefits: • 14mm thread size for larger capacity engines • Rubber insert for plug protection and retention • Chrome vanadium steel hardened, tempered and micro satin chrome plated • Length 65mm • Knurled ring for enhanced grip Contents: • 1 x 14mm Thread 6 Point Satin Chrome Spark Plug Socket, 1/2" Sq. Dr., 21mm