The Electric Grease Gun, available in 110-volt AC or 12-volt DC, provides up to 8,000-pounds-per-square-inch of pressure to unplug zerks and lubricate bearings. With an 18-inch hose, a coupler, and an air-release valve, the gun can be held in one hand, accommodates either grease cartridges or bulk grease, and pumps all standard lubricants.