Load capacity and mounting compatibility This boat trailer jack is rated up to 2000 lbs. It uses a 5.7 cm precision seamless steel tube and bolton mounting accessories, allowing easy installation on the trailer tongue bracket. Easy mobility and replacement wheels The jack features 25.4 cm load rubbercoated iron wheels for smooth trailer positioning and attachment. The wheels are removable and replaceable for longterm service. Durable construction and rust resistance Sidemounted trailer tongue jack with a galvanized main steel surface. Antirust design and a corrosionresistant zinc surface coating. It has passed a 72hour salt spray test, providing protection against rust even in harsh environments. Installation range and adjustability The bolttype swivel jack comes with 3.93inch bolt mounting hardware. It can be easily fixed on a 4*4.4inch trailer bracket and is adjustable to level 3 with a vertical travel of 10.2 inches. Use scenario: launching or retrieving a boat Ideal for launching or retrieving at ramps or docks, this jack supports heavy loads and helps position the boat on the trailer with ease, improving accuracy and control during loading. Use scenario: yard or driveway maneuvering The load wheels enable easier movement and alignment of a loaded trailer in driveways, yards, or small workspaces, reducing the effort needed to reposition the trailer. Use scenario: on uneven ground and during maintenance The vertical travel of 10.2 inches and level adjustment allow better leveling on uneven ground, making maintenance, balancing, and storage more convenient in varied environments.