1/2" 100° HSS Single Flute Countersink 12" HSS Aircraft Number Drills this bit is made for

this bit is made for durability in demanding applications

The exclusive single radial concave flute creates perfectly round holes in metal

The reduced shank design makes it versatile

These are jobber (standard) length drill bits with a 1/4" Hex Shank for quick change impact drivers

1/2" 100° HSS Single Flute Countersink 12" HSS Aircraft Number Drills this bit is made forSpecifications SIZE 1 2" OVERALL LENGTH 2" MATERIAL HIGH SPEED STEEL FINISH UNCOATED (BRIGHT) SHANK DIAMETER 1 4" NUMBER OF FLUTES 1 SHANK TYPE ROUND CUTTING ANGLE 100 SUGGESTED PACK QTY 1 Single flute countersinks are great for chamfering, deburring, and countersinking, and they provide a smooth finish on materials such as aluminum, plastic, and wood.