Irwin Wood Countersinks #4 x 7/64" Size:#4 x 7/64" No other cartridges are certified

No other cartridges are certified to be fitted with this mask

Single-spur cutting edge scribes the circumference of the hole for a smoother finish

All nozzles packed for storage in a convenient see-thru plastic case

Used for plastic siding and wood

The included hygiene cover helps keep dirt out of mask when not in use and helps keep shape of seal intact

Irwin Wood Countersinks #4 x 7/64" Size:#4 x 7/64" No other cartridges are certifiedTapered 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.