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.