Irwin 1877793 Countersink Drill Bit, Specifications: 1/4 in Shank, Black Oxide, Includes: 1/4 in, 3/8 in Countersink lawn-garden--07-13-26 Offset blades keep hands clear

Offset blades keep hands clear of metal

offering a water-resistant and airtight seal to keep out water and reduce drafts

Hardness meets or exceeds ANSI standards

Henry® ReadySet™ pre-mixed mastic adhesive is a premium

Irwin 1877793 Countersink Drill Bit, Specifications: 1/4 in Shank, Black Oxide, Includes: 1/4 in, 3/8 in Countersink lawn-garden--07-13-26 Offset blades keep hands clearPrecision ground 82 deg tip for countersinking most machinable metals, wood or plastic. HSS with black oxide coating for corrosion resistance. 5 flute design reduces chatter for smoother drilling and extended life. Set includes one 1 4 in, one 3 8 in, one 1 2 in, one 5 8 in and one 3 4 in countersink. Made of high grade heat treated forged steel, plated and black oxide finished to prevent rust Black oxide finish resists corrosion Five flute design