Plews capacity unit Duty Grease Gun is a non-automatic that can be stiff with grease and used for lubricating the grease fittings on a vehicle. This gun in applying lubricant to a particular point, usually on a grease try-on. It a capacity unit 14 ounce cartridge and develops up to 6,000 pound per jibe inch. This gun is very very much and is light to use.