This cutter is used to make the recess of the rim of rifle-chambers. The tool consists of the guide plug and the cutter. The cutter is made of high-speed-steel. The teeth are ground on CNC-machines.

The guide consists of soft steel with dimensions suitable for a minimum chamber. The guide plug is inserted into the finished chamber. The cutter is put on the pin of the guide to cut the rimrecess axial into the barrel.

For the control of the correct depth use the according rimgauges. The control of the depth should allways be made with the breechblock or bolt of the gun.