Description:

IRWIN Wood Countersinks feature a tapered drill and wide flutes that drill fast, clean holes and ensure a tight fit for screws. They have an adjustable four-cutter counter bore attachment that cuts fast and clears chips quickly for fast, smooth countersinking applications. The counter bore feature attaches flats on shank with two hex screws for a secure fit and can be adjusted for controlled hole depth. IRWIN SPEEDBOR countersink bits fit all standard 1/4" quick-change chucks, including impact drills. 1/4" quick-change shank reduces slipping in standard chucks and is compatible with all 1/4" quick-change chucks, including impact drillsCounter bore attaches to flats on shank with two hex screws for a secure fit and can be adjusted for controlled hole depthAdjustable four-cutter counter bore cuts and clears chips quicker for fast, smooth countersinkingTapered drill with widened flutes for drilling fast, clean holes and ensures tight fit for screwsModel # 1882790.