IRWIN Tools Black Oxide Metal Index Drill Bit Set with Case 29Piece 3018004

Oxide treatment Resists corrosion helps prevent bit from rusting Flatted shanks above 1164 Eliminates slippage in drill chuck Reduced shank above 38 Allows use of larger drill bits in a 38inch chuck Rubber over molded case Protects kit if dropped Tap Drill selection chart Convenient reference available Automatic indexing Enables easy bit access and identification Removable cartridges Facilitates carrying bits from case to worksite Sizes available Range from 116 to 12 in 164 increments Material Made of High Speed Steel Finish type Uncoated.