"A" HSS Threaded Shank Countersink (1/2") Left Hand Jobber Drills Fractional while the round shank makes

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

1285" BODY DIAMETER 1/2" MATERIAL HIGH SPEED STEEL THREAD SIZE 1/4-28 CUTTING ANGLE 100° SUGGESTED PACK QTY 1

as well as a 3/4" reduced shank that can be used in a wide range of tool-holding systems

1285" BODY DIAMETER 7/16" MATERIAL HIGH SPEED STEEL THREAD SIZE 1/4-28 CUTTING ANGLE 100° SUGGESTED PACK QTY 1

"A" HSS Threaded Shank Countersink (1/2") Left Hand Jobber Drills Fractional while the round shank makesSpecifications PILOT SIZE "A" DECIMAL EQUIVALENT . 2340" BODY DIAMETER 1 2" MATERIAL HIGH SPEED STEEL THREAD SIZE 1 4 28 CUTTING ANGLE 100 SUGGESTED PACK QTY 1 Threaded countersink cutters can be used in adjustable or micro stop countersinking tools with a 1 4 28 threaded drive. They are made from high speed tool steel, precision ground to exact tolerances, and form relieved to ensure a 100 countersink angle concentricity.