A counterbore hole is usually used when the head of a fastener, such as a hex head or socket head cap screw, is required to be flush with or below the level of a workpiece’s surface. For a spot-face, material is removed from a surface to make it flat and smooth, usually for a fastener or a bearing.

SOMTA Counterbore Drills are ideal for drilling holes in handle material to fit inter screws or pivot screws.