Irwin #4 - 1/8 In. Wood Countersink

Replacement tapered drill bits with widened flutes for drilling fast, clean pilot holes. Adjustable 4-cutter counterbore cuts and clears chips quicker for fast, smooth countersink or counterbore drilling. Attaches and adjusts with 2 hex screws. Counterbore attaches to flat on shank for a more secure fit. Adjustable stop collar attaches to counterbore for controlling countersink depth. 1/4" hex quick change shank reduces slipping in standard chucks and is compatible with impact drivers.

• Adjustable four-cutter counterbore for pilot-hole depth control
• Quick-change 1/4" shank reduces slipping in standard chucks
• Compatible with all 1/4" quick-change chucks, including impact drills