1/2" 100° HSS Single Flute Countersink 12" HSS Aircraft Number Drills These are jobber (standard) length

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

They are made from high-speed tool steel

Size 7/16"-29/64" Overall Length 2-3/4" Material High Speed Steel Finish Uncoated (Bright) Shank Size 1/2" Style Weldon Cutting Angle 82 Suggested Pack QTY 1

The reduced shank design makes it versatile

The length between the chucking slot on the shank to the end of the shank is a standard 3/8"

1/2" 100° HSS Single Flute Countersink 12" HSS Aircraft Number Drills These are jobber (standard) lengthSpecifications 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.