A high quality American-made quick change countersink & tapered bit made by WL Fuller. Made of carbon steel & heat-treated, this countersink is very well-built, durable, & cuts into materials well. This type “C” countersink is designed for use in all woods, plastics, & non-ferrous metals. It has four flutes for clean & accurate boring, & a standard 82° cutting angle which will accommodate most bevelled screws. The countersink is held in place with two hex-socket set screws fastened into the bit & is easily adjustable up & down the length of the drill bit if the need arises. A very popular item with our customers.  Made in the USA.,The W.L. Fuller Co. is a family owned, third generation manufacturer of the best countersinks, counterbores, plug cutters, taper point drills, brad point drills, & step drills. All made 100% in the U.S.A. today. With over 60 years experience manufacturing tools to cut woods, plastics, & metals, Fuller provides tools you need to get the job done while saving you time & money. All of their products carry their “satisfaction guarantee”. WL Fuller Combination Four-Flute Type "C" Countersink & Drill Bit ~ Hex Power Shank