Set contains the most common spark plug socket sizes used in Euro, Domestic and Asian vehicles Swivel Standard Extra Deep and Thin wall Sockets all 3/8" drive 3 Pcs. Extra Deep 9/16”. 5/8” & 13/16” 4 Pcs. Universal Joint Spark Plug Socket 14mm, 9/16”, 5/8” & 13/16” 4 Pcs. Standard Spark Pug Sockets 14mm, 9/16”, 5/8” & 13/16” 2 Pcs. Thin Wall Spark Plug Sockets 14mm & 16mm. Knurled For Finger Tip Control EVA Foam Holder For Easy Access