40 piece 1/4 inch and 3/8 inch drive combination ratchet socket set Contains 3/8 inch drive ratchet handle, 3/8 inch drive 3 inch extension, 1/4 inch x 3/8 inch adapter, 1/4 inch drive 6 inch nut driver, molded plastic case, 3-3/8 inch drive 6 point sockets: 5/32 inch, 3/16 inch, 7/32 inch, 1/4 inch, 9/32 inch, 5/16 inch, 11/32 inch, 3/8 inch, 13/32 inch, 7/16 inch, 15/32 inch, and 1/2 inch, 3-1/4 inch drive 8 point sockets: 1/4 inch, 5/16 inch, and 3/8 inch standard size, 3-3/8 inch drive 6 point sockets: 11, 12, and 13mm, 13-1/4 inch drive 6 point sockets: 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, and 13mm metric size