Infinity Tools 1/4" Shank 4-Pc. 82° Professional Countersink Set

The set includes 1/4", 19/64", 11/32", and 3/8" countersinks in a custom wood case.

They are sized for use with no. 4, 6, 8, and 9 screws, covering common furniture and general woodworking fasteners. See more drill bits & drivers.

Each countersink has a 1/4" shank, so it fits a drill press or an electric drill.

The 82° cutting head matches the angle of standard flat-head screws, so the screw heads sit perfectly flush with the surface.

Yes. The set is designed to mount flush-fitting screws in wood, plastic, and metal.

The single-flute 82° cutting head removes stock fast and drills chatter-free, shearing cleanly through material for a perfect cut.

Yes. Each countersink works in a drill press or an electric drill thanks to its 1/4" shank. Browse more drilling & boring tools.

Yes. A custom wood case is included to hold and protect the four countersinks.

It is made by Infinity Cutting Tools as a professional-quality four-piece set.

A countersink creates an angled recess so a flat-head screw sits flush, while a counterbore cuts a flat-bottomed hole, often for a plug or washer. For counterbores, see our Forstner bits.