Attributes . 6 in. Tapered drill with widened flutes for drilling fast, clean pilot holes * Adjustable four-cutter counterbore cuts/clears chips for fast, smooth countersinking *Counterbore attaches to flats on shank with two hex screws for a secure fit * Adjustable for controlled pilot hole depth * 1/4 in. quick-change shank reduces slipping in standard and quick-change chucks . Names