For processing and extending the RM chainmail, you will primarily need two flat-nose pliers (chain-link pliers) for bending, as well as a special riveting tool if the rings are to be riveted. Loose replacement rings and suitable rivets are required. To close the rings, the ends are guided past each other using the pliers, bent together under tension, and then, in the case of riveted versions, secured with the riveting tool.