Howdy,
I believe this is a chain similar to something I test/evaluated several years ago (about 1987) from an inventor in Israel. That setup was larger, on an 070 with a jungle bar (bigger nose). The thing actually did work. The "cutters" were sections of masonary cutting type abrasive/cutting particles, very much like a section taken out of a masonary cutting diamond wheel.
We did not go ahead with the idea, due to limited market. In market studies, we found the principle market would be in Europe, for the purpose of boring holes in the side of stone and masonary bank buildings to install ATM machines! Never did try to bore into a bank vault, but it crossed my mind.
Regards,
Walt Galer