Reid Select Holemaking

Combination drills and countersinks are short, double-ended drills used to produce a shallow conical or center hole, typically on the end of workpiece to be held between centers before turning in a lathe or cylindrical grinding.

Counterbores, sometimes called spotfacers, create a flat-bottomed cavity at the top of an existing hole so that a bolt, nut, or other part is hidden beneath or sits flush with the top of the hole when installed into it.

Countersinks expand the top of an existing hole in a workpiece to allow countersinking screws to install flush with the surface of the workpiece. This helps prevent the workpiece material from swelling when a screw is inserted and tightened down.

Chucking reamers are used to enlarge an existing hole to an exact size for a precise fit.