The M3 and M4 rings appeal to the inner child in all of us that has taken something apart and may or may not have put it back together again. For those whose interests never increased with carat size, the basic screw is elevated to the status of diamond. The rings feature a small cut-out that exposes the screw thread. Cast, finished and tapped in Toronto out of sterling silver, the custom stainless steel screw is removable from the ring for emergency use.