Irwin Wood Countersinks #14 15/64 In. Category_Home Safety & Security 10% larger shank for added

10% larger shank for added durability

These versatile bits are designed specifically for rotary drilling

feature aggressive carbide tooth geometry for an unmatched 50x longer cutting life

Lock-n-Load quick change extension

ideal for cast iron

Irwin Wood Countersinks #14 15/64 In. Category_Home Safety & Security 10% larger shank for addedTapered 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.