Top of the line Grease gun designed for punishing day-in and day-out heavy industrial applications Develops 10,000 PSI / 690 BAR Variable stroke feature built in for use in confined areas High Tolerance Aluminum Die Cast Grease Gun Head Built tough: Robust barrel 0.049” (1.2 mm) thick, Heavy Duty Follower Spring, CNC machined grease gun head, large rolled threads for fast & easy re-loading Complete with a choice of 6" (150 mm) steel extension or 12" (300 mm) flexible hose & professional 4 jaw coupler with ball check 10,000 PSI (690 BAR) Variable Stroke Cartridge Loading Suction Fill No False Lubrication Filler Pump Loading