Arrow Fastener RMA3/16 Medium Aluminum 3/16-Inch Rivets, 18-Pack Ideal for use on a variety of materials 3/16-inch (5mm) diameter, perfect for heavy duty jobs Grip range for up to 1/4-inch (6mm) thickness For use with Arrow model RH200S, RHT300, and RL100S 18 rivets included per pack