OEM Heavy Duty Pistol Grip Grease Gun features a pistol grip lever action for easy use. Knurled barrel for non-slip grip. Heavy duty aluminum die-cast head. Heavy duty heat-treated spring and a 4-Inch extension with standard ball check coupler. The plunger has a following lock for safety and easy loading. Cast aluminum t-handle for a sure grip and one-hand operation. Uses standard 14 oz. grease cartridge. Develops up to 6,000 PSI. Designed for professional auto mechanics and heavy duty applications.