A grease gun is a tool used to apply lubricant, typically grease, to machinery and equipment. It helps reduce friction and wear on moving parts, ensuring smooth operation and extending the lifespan of mechanical components. Grease guns come in various types, including manual, pneumatic, and electric, each designed for specific applications. The device typically consists of a cylindrical body, a plunger, and a nozzle. Users load grease into the gun, and by pressing the plunger, they can dispense the lubricant precisely where needed. Commonly used in automotive maintenance and industrial settings, a grease gun is essential for keeping machinery in optimal condition.