Porthole spherical crystal optical....
In hardened steel In this. Consisting of three blades with a special incline, in order not to deform the cartridge case and that of perfectly matching the folds in the closure of stellar.
The rifilatore is supplied complete with 2 gauges, can be used manually, or mounted on a drill or press orlatrice, instead of orlatore, therefore adjusting the precise height of the case.
With this tool it is possible to obtain the fins by borre tube of various caliber, 12 - 20 . By adjusting the height you want, and choosing to get 3-4-5 cuts.
The calibrator is able to calibrate all types of back , and replacing his bushing belt sander you can regenerate all the gauges ( 12-16-20-24-28-32-36/.410)