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Irwin
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.
#1PH X 2 OAL IMPACT POWER BIT
#1SQ X 2 OAL IMPACT POWER BIT
#2PH IMPACT INSERT BIT 2PK
#2SQ X 2 OAL IMPACT POWERBIT
#3PH X 2 OAL IMPACT POWERBIT