What is the primary use of a spark plug socket?

The primary use of a spark plug socket is to install and remove spark plugs. Spark plugs are critical components of an internal combustion engine, requiring proper installation and removal during maintenance or replacement. The spark plug socket is specifically designed to fit the hexagonal shape of spark plugs, allowing for a secure grip. It often features a rubber insert or magnet to help hold the spark plug in place when installed or removed, which aids in preventing damage to the spark plug or the engine.

By utilizing a spark plug socket for these tasks, mechanics ensure that the spark plugs are not stripped and are firmly secured, which is vital for engine performance. This tool is essential for anyone working on engines, as it simplifies what could otherwise be a challenging process, especially in tight engine compartments.