What tool is typically used to remove old spark plugs?

The use of a socket wrench is essential when it comes to removing old spark plugs. Spark plugs are typically secured tightly into the engine's cylinder head, and a socket wrench provides the necessary leverage and grip to unscrew them effectively. The design of the socket wrench allows it to fit snugly over the spark plug, which prevents rounding off the edges while applying torque.

Additionally, the proper size socket is specifically made to accommodate the hex head of the spark plug, ensuring that it engages fully and does not slip. Some socket wrenches even come with a rubber insert or magnetic tip, which helps hold the spark plug while removing it from the engine.

Other tools like pliers or a screwdriver do not provide the same secure fit or leverage needed for this task, while a torque wrench is specifically used for applying a defined amount of torque when installing spark plugs, rather than removing them.