Dutton-Lainson DLX-SW Manual Swivel Trailer Jack This marine trailer jack is easy to install and swivels up locking in place for convenient towing. The wheel bracket rotates independent from the inner post to allow greater maneuverability over rougher terrains such as gravel or sand. The slotted wheel has a 8 diameter and is constructed from heavy duty polypropylene to resist cold weather cracking. The side wind cushioned handle features an ergonomic handle grip with an extra heavy screw drive t