1/2" 100° HSS Single Flute Countersink 12" HSS Aircraft Number Drills The reduced shank design makes

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

reducing walking and ensuring cleaner holes

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

1/2" 100° HSS Single Flute Countersink 12" HSS Aircraft Number Drills The reduced shank design makesSpecifications 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.