Tapered drill with widened flutes for drilling fast, clean pilot holes and ensures tight fit for screws

Adjustable four-cutter counter bore cuts and clears chips quicker for fast, smooth countersinking

Counter bore 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

Adjustable stop collar attaches to counter bore with two hex screws for a secure fit and can be adjusted for desired counter bore depth

Both the Countersink bits & the collars have hex nuts for easy adjusting tightening & accurate positioning.

Cutting Diameter: 1/2-Inch

Drill Hole Size: 1/4-Inch

Adapter Shank: Quick-Change 1/4" Hex Shank Adapter