Axle jack is geared for everyday HD use in the field and in the shop. Tight tolerances, polishing on the pistons, upgraded seals, inline oiler, and grommets to hold all 3 extensions in place make this jack and industry standard. 1" drive impact gun has 3 reverse and 3 forward speeds and D-handle for more precise control. All aluminum casing and rocking dog hammer mechanism make this tool powerful, durable and reliable even in the harshest conditions. Exhaust ports direct air away from operator.