Patented RotoDrive Cranked Countersinks allows the user to chamfer holes, deep holes and continuous rotation for fast and accurate chamfering.

Noga Countersinks can remove these rough ridges and put a chamfer between the hole and the surface into which the hole was drilled. Noga Countersinks can also create a deeper recess into a hole, in order to prevent a flat head screw from projecting over the surrounding surface.