8 Piece 3/8" Drive Metric Hex Bit socket Set. 8 piece set is made in the U.S.A. Bit sockets feature SK"s high polish SuperKrome finish, which provides for long life and maximum corrosion resistance. Through-hole design makes it easier to replace worn or broken bits: simply pop the old bit out and insert a new replacement bit. C-Clip retention groove in the hex end provides a secure hold on the bit while in use. Bits are manufactured to rigid standards using high strength S2 steel. 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm Hex Bit Sockets. Packaged on a plastic rail.