Irwin Wood Countersinks #4 x 7/64" Cleveland Feed arbor 1"- 20 mm segmented

arbor 1"- 20 mm segmented rim for fast aggressive cuts

Corrosion-resistant

Adapts to any 500-1500 rpm variable speed drill

ROCKITE is an expanding

Irwin Wood Countersinks #4 x 7/64" Cleveland Feed arbor 1"- 20 mm segmentedTapered drill with widened flutes for drilling fast, clean pilot holes. Adjustable four cutter counterbore cuts and clears chips quicker for fast, smooth countersinking. 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" quick change shank reduces slipping in standard chucks and is compatible with all 1 4" quick change chucks, including impact drills.