Big Horn 18911 #7 Countersink with Taper Drill from W. L. Fuller # C5M. Universal 1/4-inch quick-change hex shank prevents slipping in standard chucks and is compatible with all 1/4-inch quick-change chucks, including impact drills; Suitable for drilling holes on board of low hardness such as wood, plastic and other soft material. Drilling length can be adjusted for various length screws simply by loosening and Tightening the set screw.

The countersink designed to cut clean and hardened for long wear, is held in place with 2 hex-socket screws that should be set into the flute of the drill. This taper point dill bit is made from high-quality High-Speed Steel and has 1/4” quick-change hex adapter. Combined to make drilling easier and to assure the best possible holding power.

Features:

• W.L. Fuller (C5M) Made in USA Bit
• 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.

Specifications:

• Cutting Diameter: 3/8-Inch
• Drill Hole Size: 5/32-Inch
• Adapter Shank: Quick-Change 1/4" Hex Shank Adapter