Fill your designs with rivets with the help of the TierraCast 6mm rivet setter. Simply place this tool over the rivet you want to set and strike with a hammer. The hexagonal edges of this tool make it easy to grip and keep in place while using. This rivet setter works with rivets that are 6mm in size. Rivets make excellent embellishments in leather designs or mixed media projects, so you have to have the best tool for securing them in place.