Rivets are permanent mechanical fasteners that join two or more pieces of material, typically metal. They consist of a smooth cylindrical shaft with a head on one end; upon installation, the rivet is placed through pre-drilled holes in the materials, and the tail is deformed, creating a second head that holds the materials together. Rivets are valued for their durability, strength, and reliability in structural applications, including construction, aerospace, and automotive industries, where a secure and lasting bond is critical. .