Irwin 1882785 Countersink Replacement Drill Bits, # 14 Rods Blue zirconia disc used with

Blue zirconia disc used with 4-1/2" angle grinders

For new concrete

with an included hang hole for simplified storage

"OSHA" approved

Speeds slow flushing toilets of build-up

Irwin 1882785 Countersink Replacement Drill Bits, # 14 Rods Blue zirconia disc used withHighlights: Bit # 14 Tapered drill with widened flutes for drilling fast, clean pilot holes 1 4" quick change shank reduces slipping in standard chucks and is compatible with all 1 4" quick change chucks, including impact drills Adjustable four cutter counterbore cuts and clears chips quicker for fast, smooth countersinking Counter bore attaches to flats on shank with two hex screws for a secure fit and can be adjusted for controlled pilot hole depth