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
- Straight shank 1/4"
- Size 9/16", hole diameter 1/8", overall length 2 13/16"
- Must be used with 1/8" shank counterbore pilot, not included