Use this cutter to make an exact 20mm hole for the Parf Guide System. The cutter’s design results in a clean hole. The tungsten carbide tips ensure a working life long enough to help produce many Parf guide system bench tops. The cutter has a sharp pointed 3mm guide pin to locate in the pilot hole. This leading spike helps to keep it running true through the pilot holes. Twin spurs cut clean entry and exit holes. The main cutting edges remove the waste and their angle produces a shear cutting action at the sides. Precision grinding of the round part of the shank guarantees an exact fit in the guide bush of the Parf Guide Block.