TMB's BAC-W465P326587 Square Tube Trailer Jack features durable welding on the crank shaft and a robust 4" square tube construction, ensuring long-lasting performance for heavy-duty trailers. With a lifting capacity of 12,000 lbs. and an extended length of 54-3/4", it supports a wide range of trailer sizes and weights, making it perfect for various towing applications. Equipped with a twin thrust bearing system, this jack provides smooth, easy extension and retraction, simplifying the process of hitching and unhitching trailers. The large 3/4" pull pin activates a spring return mechanism for fast and efficient deployment and stowing. Built-in grease zerk fittings make lubrication quick and easy, helping to maintain optimal performance and extend the lifespan of the jack with minimal effort. The black painted finish offers excellent protection against corrosion and wear, safeguarding the jack from harsh outdoor elements. The beveled design on the shaft end enhances safety by removing sharp edges. Designed with a footpad for added stability, this jack provides a secure foundation for your trailer.