Description: 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 ...

The CRL Weldon Countersink set has an 82 cutting angle and is ideally used for aluminum material. Its best suited for a 1/4 or 3/8-inch drill chuck since it has a 1/4-inch (round) shank diameter.