Lumax Brand Grease Gun Heavy Duty, Deluxe . Deluxe, contoured lever creates more pressure with less effort. For industrial users who demand a grease gun for punishing day in and day out service. Heavy-duty, LuCast, Cast-Alloy Head with heavier and reinforced wall thickness for extra strength. Develops up to 10,000 PSI (690 Bar) Handy 3-way loading - fill with Standard Cartridge, suction or bulk fill. Equipped with air bleeder valve to vent air pockets and filler nipple with ball check for use with grease filler pump. Maintains pressure and grease flow on short strokes. Heavy gauge steel barrel withstands high crush pressures. Heavy-duty follower spring for consistent priming. Rugged, wide band, non-slip knurling for sure-grip handling. Full-molded follower for superior seal, eliminates grease bypass.