Counter SunkRivetsare manufactured fromaluminium witha break-mandrel. Use countersunk rivets to keep the surface of the connected object smooth. When the surface is covered with paint the head of the rivet iscompletely invisible. This makes the surface more aesthetically pleasing,less drag is createdthan if air was needed to flow over a common rivet head, making these rivet coverings common in high-performance vehicles or applications.