10-pc. Master Spark Plug Socket Set Seven of the most popular spark plug socket sizes for use on a majority of foreign and domestic vehicles. Installed magnets securely hold spark plugs during removal or installation . Dual drive feature enables you to turn sockets using either a 3/8’’ internal square drive or wrenches on the external drive hex. Three different 3/8” locking square drive universal joint extensions allow access to difficult to reach areas. Locking square drive securely holds the socket to the universal joint extension bar during installation and removal . Chrome vanadium steel for strength and durability. Full polish chrome finish for superior corrosion resistance. Meets or exceeds ANSI standards Set Includes:. PLT-99616 - 3/8” Drive, 5/8” 6-Point Magnetic Spark Plug Socket. PLT-99617 - 3/8” Drive, 13/16” 6-Point Magnetic Spark Plug Socket. PLT-99618 - 3/8” Drive, 9/16” 6-Point Magnetic Spark Plug Socket. PLT-99619 - 3/8” Drive, 3/4” 6-Point Magnetic Spark Plug Socket. PLT-99620 - 3/8” Drive, 14mm 12-Point Thin Wall Magnetic Spark Plug Socket. PLT-99621 - 3/8” Drive, 16mm 10” Long 12-Point Thin Wall Magnetic Spark Plug Socket (Matte Finish). PLT-99622 - 3/8” Drive, 18mm 6-Point Magnetic Spark Plug Socket. PLT-99623 - 3/8” Drive, 4” Locking Square Drive Universal Joint Extension. PLT-99624 - 3/8” Drive, 7” Locking Square Drive Universal Joint Extension. PLT-99625 - 3/8” Drive, 11” Locking Square Drive Universal Joint Extension. Custom blow-molded tray 99610 Yes - LEAD AND LEAD COMPOUNDS