1" 90° HSS 3-Flute Countersink 12" HSS Aircraft Letter Drills Ideal for hard metals

Ideal for hard metals

also known as machine countersinks

These drills have a 14" drilling depth and are sold individually

QTY 1 STE3HEX (1/4" - 3/4" x 16ths)

They feature a left-hand helix and are made of high-speed steel with a 118° conventional point

1" 90° HSS 3-Flute Countersink 12" HSS Aircraft Letter Drills Ideal for hard metalsSpecifications SIZE 1" OVERALL LENGTH 3 1 2" MATERIAL HIGH SPEED STEEL FINISH UNCOATED (BRIGHT) SHANK DIAMETER 1 2" NUMBER OF FLUTES 3 SHANK TYPE ROUND CUTTING ANGLE 90 SUGGESTED PACK QTY 1 3 flute countersinks, also known as center reamers, are commonly used to countersink holes for centers or to enlarge existing holes.