This Dutton-Lainson bolt-on wheel jack is perfect for boat and jet ski trailers, featuring corrosive resistant zinc-plating and a heavy-duty wheel for maneuverability. The TUFFPLATE zinc finish makes this trailer jack perfect for freshwater and saltwater marine environments alike, while the polypropylene wheel allows you to move your small boat or jet ski trailer with ease when it is not being towed. The jack comes with all mounting hardware included, and is sized to mount to trailer frame or tongue heights measuring between 3" and 5".This is a fixed jack, meaning that it will not swivel to a parallel position on your trailer frame. The jack features floating miter gears for easier operation and an ergonomic molded handle with a textured grip for added comfort. If you want to increase the longevity of your jack assembly, you will want to periodically take the cap off the top of the jack and lubricate the gear housing with grease, and spray some rust inhibition product (such as Boeshields T-9) on the included mounting hardware. This reliable boat trailer wheeled jack is ready to mount to your trailer out of the box and work for years to come; it is built in the USA and comes with a 3-year limited warranty.Features- Rust-resistant zinc plated swivel trailer jack- Includes mounting hardware- 6-inch heavy-duty polypropylene wheel for easy trailer movement- Ergonomic comfort-grip side wind handle- 3-year Limited Warranty- Made in the USASpecifications- 1,200 lb weight capacity- Mounts to trailer frames 3" to 5" in height- 15 inches of travel, minimum height: 10 1/2 inches, maximum: 24 1/4 inches (measured from floor to top of tongue)- 4 bolt mounting hardware with brackets included, bolts measure 3/8" x 4"