Sets contain the most common spark plug socket size used in Euro, Domestic and Asian vehicles. Swivel Standard Extra Deep and Thin wall Sockets all 3/8" drive. Set is made up of sockets with a satin finish, all laid in a black and green EVA foam with labeled sizes. Each socket is conveniently knurled to allow the tech to turn by hand if needed. Sets include: Extra Deep, Universal Joint, Standard, and Thin Wall Spark Plug Sockets.