TEKTON 1788 3/8-Inch Drive by 5/8-Inch Extra Long Spark Plug Socket Extra-long design reaches spark plugs on engines with overhead camshafts Rubber grommet inside holds on to spark plug for sure-handed installation and removal 6-point opening snugly fits spark plug to apply maximum torque without slipping Advanced design grips flat sides of spark plug hex, not corners, to prevent round-off Made of premium chrome vanadium steel with a protective black oxide finish