1" 60° HSS 4-Flute Countersink 60° Single-Flute Countersinks All 4-flute countersinks have a

All 4-flute countersinks have a 1/2-inch shank

high-tensile strength materials such as aluminum

These drills have a 9" drilling depth and are sold individually

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

4-flute countersinks

1" 60° HSS 4-Flute Countersink 60° Single-Flute Countersinks All 4-flute countersinks have aSpecifications SIZE 1" OVERALL LENGTH 4 3 8" MATERIAL HIGH SPEED STEEL FINISH UNCOATED (BRIGHT) SHANK DIAMETER 1 2" NUMBER OF FLUTES 4 SHANK TYPE ROUND CUTTING ANGLE 60 SUGGESTED PACK QTY 1 4 flute countersinks, also known as machine countersinks, can be used to enlarge existing holes. All 4 flute countersinks have a 1 2 inch shank.