1" 60° HSS 3-Flute Countersink 60° 4-Flute Countersinks 4-flute countersinks

4-flute countersinks

are commonly used to countersink holes for centers or to enlarge existing holes

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

PILOT SIZE #40 DECIMAL EQUIVALENT

1" 60° HSS 3-Flute Countersink 60° 4-Flute Countersinks 4-flute countersinksSpecifications 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 60 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.