Review on 🚚 Fulton XPD15L0101 Swivel Trailer Jack with Dual Wheels - 1500 lbs. Load Capacity, Heavy-duty Steel Construction by Kyle Hong

Although like me you can mount this to a 3" x 5" trailer frame you will need to rotate the mounting bracket on the side to align the bolt holes for this size, which, at least visually, doesn't look as solid as the bracket mount when it comes out of the packaging. I mounted the bracket to a trailer that weighs just under 7,000 pounds with the boat and sitting in the shed is fine. However, I would try to avoid excessive swaying of the loaded trailer with this bracket orientation.