SK Tools Model SKT-19704 4 Piece 3/8" & 1/2" Drive Metric Triple Square Bit Socket Set 1/2" Drive Fractional Long Hex Bit Socket - 5/16", 3/8", 1/2", 9/16", 5/8" SuperKrome finish provides long life and maximum corrosion resistance Through-hole design High strength S2 steel Made in the U.S.A.