The ARES 3-pc Spring Loaded Universal Joint Magnetic Spark Plug Socket Set, No. 11080, includes three 3/8" drive magnetic spark plugs in 14mm, 9/16", and 5/8" sizes. Constructed of high-quality chrome vanadium material with a polished chrome plated finish for rust and corrosion resistance, each spark plug socket features a spring-loaded universal joint design that prevents the joint from becoming loose and falling to the side. This design allows for easier placement of sockets on spark plugs that are hard to reach, and the interior magnets retain and protect spark plugs for easier installation and removal.