What exactly is a grease gun, and why do you need to load and prime it? Here's how this tool works, and what steps you need to take to ensure it works properly.

If you're in the market for a grease gun to keep all those gears lubricated, Milwaukee's battery-powered grease gun may be the perfect fit for you.

I used this hands-on experience, in addition to online research and customer feedback, to put together this list of the best grease guns you can buy.

You need to load and prime a grease gun properly before use in order to avoid air gaps that could cause sputtering, blanks, and reduced grease flow.