Aluminum pop rivets are also known as blind rivets , it is one of fasteners to rivet objects  ,sizes normally from 2.4 to 6.4 for standard . Rivet is comprised of two components , a rivet body and mandrel , the rivet is first placed into an installation tool , and is then inserted into the application or vice versa , activating the tool pulls the rivets mandrel drawing the mandrel head into the blind end of the rivet body . This action forms an upset head on the rivet body and securely clamps the application materials together . The mandrel reahes its predetemined break load , with the spent portion of the mandrel breaking away and being removed from the set rivet , fast and easy to use blind rivet offer speed of assembly , consistent mechanical performance and excellent installed appearance , making blind riveting a relable and econmoical assembly method