Irwin Black Oxide Metal Countersink 1/4" BLK OX, Each

High speed steel with black oxide coating for corrosion resistance. 5 flute design reduces vibration for smoother drilling. Precision-ground 82 deg (degree) tip for countersinking into most machinable metals. 1/4" round shank compatible with all hand held and stationary drills. No. 1877714: Bit Diameter: 1/4 In. Shank Type: 1/4 In. Round For Use With: Most Machineable Metals Individual/Set: Individual Pkg Qty: 1 Package Type: Card No. 1877715: Bit Diameter: 3/8 In. Shank Type: 1/4 In. Round For Use With: Most Machineable Metals Individual/Set: Individual Pkg Qty: 1 Package Type: Card No. 12411: Bit Diameter: 1/2 In. Shank Type: 1/4 In. Round For Use With: Most Machineable Metals Individual/Set: Individual Pkg Qty: 1 Package Type: Card No. 12412: Bit Diameter: 5/8 In. Shank Type: 1/4 In. Round For Use With: Most Machineable Metals Individual/Set: Individual Pkg Qty: 1 Package Type: Card No. 12413: Bit Diameter: 3/4 In. Shank Type: 1/4 In. Round For Use With: Most Machineable Metals Individual/Set: Individual Pkg Qty: 1 Package Type: Card