Irwin 1890451 Countersink Wood Drill Bit Set, 19-Piece

Irwin 1890451 Countersink Wood Drill Bit Set, 19-Piece

Tapered drill with widened flutes for drilling fast, clean pilot holes.Adjustable four-cutter counterbore cuts and clears chips quicker for fast, smooth countersinking.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.IMPACT 22PC Drill Drive Set incl #4, #6, #8, #10, #12, depth stop (1) 16 FD bits