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Irwin® Round Shank HSS Countersink Drill Bit has aggressive screw pitch for faster drilling and wide flutes for maximum chip removal.
Irwin® Countersink drill bit has round shank of dia 1/4" and 3/8" flute for enhanced performance. Brill bit has 1/2" dia with aggressive screw pitch for faster drilling and is ideal for metal, plastic as well as wood applications.
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