6mm silver compression rivet by TierraCast. Two part compression rivet can be set without the use of other riveting systems as it is double headed, and gives a superior finished appearance. The cap for this rivet is 3.2mm. The post is just under 2.5mm thick and is 7.7mm tall.Pair with TierraCast's 6mm Rivet Setter Tool (TC01812). These lead-free pewter rivets are made with high quality metals right here in the USA!