Kobalt 40-Piece Standard and Metric Mechanics Tool Set with Hard Case Contains 21 commonly used shallow and 16 deep metric and SAE sockets, 1 spark plug socket, 1 ratchet and 1 extension 3/8-in drive sockets and 6-in extension Shallow 12 point socket sizes include 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8 In. and 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 and 19 mm