Grease Gun

A grease gun is a common workshop and garage tool used to apply lubricant, usually from a grease cartridge, through an aperture to a specific grease fitting on a machine. Grease guns come in four main types: hand-cranked guns, which use trigger pressure to force grease out; push-action guns, worked by manual pressure on the tool's butt to slide a piston; pneumatic guns, driven by compressed air; and electric guns, powered by a motor and often battery-driven for portability. These tools are designed for thicker, heavier lubricants than an oil can would dispense, and the resemblance between a hand-powered grease gun and the World War Two era M3 submachine gun is the reason that weapon picked up the nickname Grease Gun. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/