Master Mechanic, 54 Piece, 1/4 x 3/8" Drive, Mechanics Tool Set: Set Includes: 1/4 Drive 6 Point Sockets SAE Sizes: 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 1/2", Metric Sizes: 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm & 13 mm, 3/8 Drive 12 Point Sockets SAE Sizes: 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", Metric Sizes: 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm & 18 mm, Phillip Bits: #1, 2 & 3, Slotted Bits: 4, 5.5 & 6.5, Torx Bits: 10, 15 & 20, 1/4 Drive Spinner Handle, 1/4 Drive Bit Adapter, 3/8" Tear Drop Ratchet, 3/8 Drive 3" Extension Bar, 3/8 Drive 5/8" Spark Plug Socket.