This is an extremely unique, proven micro adjustment 3 jaw chuck that enables concentricity to be adjusted to within .0002'' (0.005mm) very quickly.
We now utilise an even better system from a US manufacturer.
Most other gunsmiths use traditional 6 jaw chucks that take time to set up.
The 11° Target Crown cutter is held in a 'Floating Reamer Holder' that also aligns perfectly with the bore.
