The Vestil TJ-06 side swivel and wheel trailer jack has a crank handle on one side, an adjustable mounting bracket with eight mounting holes on the other, and a caster wheel, and it can be mounted to a trailer to raise or lower it for hitching, leveling, or loading. The side crank handle can be used to raise or lower the trailer. The mounting bracket has eight mounting holes and adjusts from 26" high to 16" high. The wheel measures 1-3/4" wide and 5-1/2" in diameter and is made of solid rubber, which can't go flat and is resistant to wear. The trailer jack has a load capacity of 800 lb., weighs 21 lb., and measures 33-1/2" high extended and 23-1/2" high retracted. 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.