8 piece Metric Hex bit Top-grade hex bit socket sets include all the sizes you'll need Includes a socket rail with handle for quick organization and easy transport Sizes are easy to read with reverse laser imprint on each socket Mechanic-grade with a lifetime guarantee Set includes 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, and 12 mm sockets for a 3/8 drive