Butt connectors are electrical connectors used to join two wires together. They are typically cylindrical and made of metal, allowing for a secure and conductive connection. To use a butt connector, the ends of the wires are stripped of insulation, inserted into the connector, and then crimped to ensure a tight fit. These connectors are commonly used in various applications, including automotive wiring and home electrical projects. They provide a reliable way to extend or repair electrical circuits without soldering. Butt connectors come in different sizes to accommodate various wire gauges, making them versatile for many tasks.