What tool is specifically designed to apply grease to mechanical components?

The grease gun is the appropriate tool for applying grease to mechanical components. It is designed to dispense grease in a controlled manner, allowing for precise application to various machinery parts. Grease guns typically come with various nozzle attachments or fittings, enabling users to easily reach hard-to-access areas.

In contrast, while an oil pump can be used to circulate oil in different machinery applications, it is not suitable for applying grease. A lubrication system generally refers to a broader setup that may include oil and grease application systems but does not specifically denote the application method for grease. A pneumatic sprayer, although useful for applying liquids, is not designed for grease and may not effectively distribute the thicker consistency of grease, making it less suitable for this specific task.