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

PermaLock® fastener eliminates nut and bolt failure

Cuts straight and wide curves (when trimming light gauge stock)

Hardness meets or exceeds ANSI standards

optimized color temperature and even beam patterns all designed to improve productivity and safety

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