Spark plugs are unique. You need a strong tool to release stubborn stuck plugs yet a soft touch so you don’t do any damage. This 5-piece 3/8-inch Drive Spark Plug Socket Set offers a useful assortment of SAE and metric 3/8-inch drive spark plug sockets that are strong as well as protective of the spark plugs. The premium Chrome Vanadium steel sockets have a mirror-polished chrome finish for durability yet have innovative rubber inserts to protect the spark plugs. The sleek chrome finish is enhanced with an easy-to-read size marking that is forged into the metal socket. Exclusive to Powerbuilt, precision chamfered Z-Drive 6-point hex faces easily guide the sockets onto fasteners and allow for a more solid grip on the flat surfaces to prevent damage or rounding.