29 Pc. Drill Bit Industrial Set Case, Black and Gold Oxide

29 piece black & gold metal index drill bit set oxide treatment resists corrosion, helps prevent bit from rusting turbomax tip starts up to 10x faster flatted shanks above 11/64" eliminates slippage in drill chuck reduced shank above 3/8" allows the use of larger drill bits in a 3/8" chuck rubber overmolded case protects kit if dropped tap & drill selection chart for convenient reference. automatic indexing for easy bit access and identification removable cartridges easy to carry bits from case to worksite includes 1/16" to 1/2" sizes in 1/64" increments metal index case.