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The Vestil LJ-21 steel leveling jack is a screw jack that has a handle, a swivel base, and two adjustable flanges, and can be fed through a hole in a platform or a piece of equipment to hold it at a fixed height. The upper and lower flanges adjust from 4-1/2 to 25-1/2 inches high and have mounting holes that allow the flanges to be bolted to the platform or object. The leveling jack is made of steel, which is resistant to wear and corrosion, and has a chrome finish that can be wiped clean. A handle and swivel base allow the user to rotate the jack and adjust the flanges 1/4" per revolution to the desired height. A rubber pad on the bottom of the base helps prevent slipping. The handle measures 8-1/2" long and folds down when not in use. The leveling jack measures 30" high overall and 1-1/4" in diameter, weighs 16 lb., and has a lifting capacity of 5,000 lb. and a holding capacity of 10,000 lb. The base of the jack measures 3-7/8" in diameter. Each flange measures 3-5/8" in diameter and 1/8" thick and has six mounting holes arranged in a 3" circle. Each mounting hole measures 1/4" in diameter. This product is intended for use in professional and industrial environments.Jacks are machines used to lift heavy objects, such as vehicles, trailers, structures, or heavy machinery. Jacks come in a range of styles for different applications. Common varieties include bottle jacks, which resemble a large bottle in shape and use hydraulic force to lift the load; floor jacks, which typically contain a long pump handle and caster wheels and sit low to the floor; and tongue jacks, which can be mounted onto the frame of a trailer to lift and lower it. Jacks can be used on construction sites or in warehouses, automobile repair shops, or industrial facilities.Vestil manufactures materials handling equipment, including hoists and trolleys, jib and gantry cranes, loading dock equipment, and storage solutions. The company, founded in 1968, is headquart