HEAVY-DUTY TRAILER JACK: Engineered for vehicles workloads, Nilight Bolt on trailer jack delivers a 2,000lbs lifting capacity, making it ideal for RV, boat, trailers, and heavy-duty equipment. Compatible with a variety of vehicles, meeting professional and home needs 10" EXTENDED TRAVEL RANGE: The boat trailer jack features a flexible 10" vertical travel range, retracts to 10" for seamless towing, and extends to 20" for optimal lift height. This wide range of adjustability accommodates uneven terrain, low trailers, and high ground clearance vehicles DURABLE MATERIAL: The RV Trailer Jacks main body adopts high-strength alloy steel forming process, which can bear long-term load without deformation. The surface is specially coating with black powder to prevent rust and corrosion. The base is wide and can provide stable support Effortless Operation: Nilight Trailer jack is bolt-on. The trailer tongue jack can be rotated, which is very simple and convenient. The rotating handle is ergonomically designed and can be raised and lowered with one hand. No complicated tools are required, and the installation is completed quickly, so novices can also use it easily PACKAGE INCLUDES: A boat trailer jack, A top wind handle, 2 x Connecting Plate, 4 x Bolt, instruction manual. If you have any questions, please feel free to contact us, our after-sales team is always at your service