Check out Top Shelf Garage's portable work carts. Made in USA with heavy-duty, recycled plastic. They are lightweight but heavy-duty. Chemical and weather resistant plastic. Durable and long-lasting. Comes with castors and brakes.
Store our carts in your trailer, and roll them around the job.
"These work carts are very convenient on the job and help keep us organized. It's nice having a central and mobile location to put our tools and equipment and not having to run back and forth to the trailer a bunch of times." Sheldon, Finished Carpenter.