1" 60° HSS 4-Flute Countersink 60° Single-Flute Countersinks Ideal for hard metals

Ideal for hard metals

while the round shank makes them compatible with various tool-holding systems

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

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

1" 60° HSS 4-Flute Countersink 60° Single-Flute Countersinks Ideal for hard metalsSpecifications 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.