The TEKTON 1785 3/8 in. Drive by 5/8 in. Spark Plug Socket is constructed of drop forged, heat treated steel with a durable chrome plated finish to resist corrosion. The built-in rubber grommet grips spark plug for easy installation and removal. This socket has a 6-point end and contains a notched drive end that locks onto ratchet or extension. And, don"t worry, it"s backed by the TEKTON lifetime replacement guarantee. So, go ahead, Take It On.