29 piece, gold oxide, drill bit set, consists of: 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64" & 1/2", versatile general purpose drill bit set features gold oxide coating, shanks that fit standard 3-jaw drills, use in drilling wood, plastic & light gauge metal, bits 1/8" & larger feature 135 degree split points on the tips to reduce bit walking, gold oxide coating provides longer bit life by resisting heat buildup, standard shank diameters fits standard 3-jaw drills, both corded & cordless, universal drilling applications designed for general purpose drilling in wood, plastic & light gauge metal.