Rivets are metal pins or bolts that are used to join two or more pieces of metal or other materials. They have a head at one end and a tail at the other, which is flattened or spread out after passing through the holes in the pieces. Rivets are permanent fasteners that provide strong and reliable joints.

Rivets are used for various applications, such as building structures, bridges, aircraft, ships, vehicles, machines, and electronic devices. Rivets can withstand high loads, vibrations, and temperature changes. They also prevent corrosion and leakage between the joined pieces.

Some of the benefits of rivets are:

- They are easy to install and do not require special tools or skills.
- They are cheaper than other fasteners, such as bolts, screws, or welds.
- They do not damage or weaken the materials they join, unlike drilling or welding.
- They can join different types of materials, such as metals, plastics, or composites.
- They can create aesthetic and decorative effects with different shapes, sizes, and colors of heads.