1" 90° HSS 3-Flute Countersink 12" HSS Aircraft Letter Drills Please note that these bits

Please note that these bits are for use with SDS-Plus drills only

1590" BODY DIAMETER 1/2" MATERIAL HIGH SPEED STEEL THREAD SIZE 1/4-28 CUTTING ANGLE 100° SUGGESTED PACK QTY 1

SIZE 1-3/4" OVERALL LENGTH 4-1/4" MATERIAL HIGH SPEED STEEL FINISH UNCOATED (BRIGHT) SHANK DIAMETER 1" NUMBER OF FLUTES 6 SHANK TYPE ROUND CUTTING ANGLE 90° SUGGESTED PACK QTY 1

Single flute countersinks are great for chamfering

6-flute countersinks

1" 90° HSS 3-Flute Countersink 12" HSS Aircraft Letter Drills Please note that these bitsSpecifications 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.