Made of high speed steel, this interchangeable pilot counterbore features a four flute cutting head, and 1/4" straight shank. Designed to enlarge an existing hole for hiding a screw head or seating a nut. Must be used with 1/8" shank counterbore pilot (sold separately).
Four flute interchangeable pilot counterbore, high speed steel
Must be used with 1/8" shank counterbore pilot, not included
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