Pop rivets are fasteners used to join two or more materials together, typically in construction and manufacturing. They consist of a smooth cylindrical shaft with a head on one end. To install a pop rivet, a special tool called a rivet gun is used to pull the shaft, causing the other end to expand and create a secure bond between the materials. These fasteners are popular because they are easy to use and require no special skills. They can be made from various materials, including aluminum and steel, making them suitable for different applications. Pop rivets are commonly used in projects involving metal, plastic, and wood.