Irwin 1882792 Countersink Bit Set, Specifications: 1/4 in Shank, HSS, Includes: #4, #6, #8, #10, #12 #14 Countersinks

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Tapered drill with widened flutes for drilling fast, clean pilot holes. Adjustable four-cutter counterbore cuts and clears chips quicker for fast, smooth counter sinking. Counterbo re attaches to flats on shank with two hex screws for a secure fit and can be adjusted for controlled pilot hole depth. 1/4 in quick change shank reduces slipping in standard chucks and is compatible with all 1/4 in quick change chucks and impact drills. Set includes two depth stops, one #4, one #6, one #8, one #10, one #12 and one #14 bit. Adjustable four-cutter counterbore cuts and clears chips quicker for fast, smooth counter sinking 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 in quick change shank reduces slipping in standard chucks and is compatible with all 1/4 in quick change chucks, including impact drills Show more