Powerwinch Dual Wheel Bolt On 1500lb Zinc Coated Trailer Jack. Designed for light-duty and occasional use, this manual trailer jack delivers reliable performance with a simple mechanical design that's easy to install, operate, and maintain. Constructed from durable steel, the Utility Series offers dependable trailer support for homeowners and recreational users who need functional performance without added features or complexity. Whether supporting a small boat trailer or a light utility trailer, these jacks get the job done with confidence.