1" 60° HSS 3-Flute Countersink 60° 4-Flute Countersinks are commonly used to countersink

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

while the high red hardness allows for drilling speeds up to 30% faster than standard M2 HSS

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

These are jobber (standard) length drill bits with a black and gold surface treatment

1" 60° HSS 3-Flute Countersink 60° 4-Flute Countersinks are commonly used to countersinkSpecifications 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.