Norco Professional Lifting Equipment - The 72090A Heavy Duty 20 Ton Air/Hydraulic Floor Jack - Low Profile Height is for heavy duty truck, agricultural and heavy construction equipment and is ideal for loaded truck and trailer roadside service calls. It features a long handle with 36-1/2” reach which helps in positioning jack under vehicles with low overhang, a hand grip which also works as a stand to store the jack in a vertical position, a compact design fits easily between tandem wheels, a Parkerized coating on pump piston, extension screw and extension adapters and chrome coated ram offer protection against rust, removable extension screw is used with the two 4” extension adapters (included) for added height when necessary, a self-retracting ram which eliminates manual lowering of the jack, 5-1/4” diameter high impact composite wheels make maneuverability easy, a fast efficient air pump which reduces lifting time and has a built-in relief mechanism which prevents the jack from being used beyond its maximum capacity, and a convenient push button air valve connected to an in-line filter prohibits contaminates from entering the air/hydraulic system.