IRWIN® Wood Countersinks has an adjustable four-cutter counterbore cuts and clears chips quicker for fast, smooth countersinking
Tapered drill with widened flutes for drilling fast, clean pilot holes
Counterbore attaches to flats on shank with two hex screws for a secure fit, and can be adjusted for controlled pilot hole depth
1/4" quick-change shank reduces slipping in standard chucks and is compatible with all 1/4" quick-change chucks, including impact drills