DUTTON-LAINSON DLx-SF Marine Jack, Swivel, 2,000 lb. When hitching and unhitching loaded trailers, D-L heavy duty tongue jacks are real back savers. These easy-to-install, smooth operating jacks can be mounted in a variety of ways on various sizes of trailer tongues. They reduce the physical effort required to maneuver a loaded trailer into hitching position or removing the trailer from a vehicle. All models are made from heavy gauge steel for strength and durability. Features include: Totally enclosed outer tube helps protect miter gears and heavy duty Acme screw from sand and dirt2-1/2" diameter mounting hole in swivel bracket fits most other brands of mounting hardwareFloating miter gears allow for proper clearance and easier operationTough polypropylene wheels or zinc plated footSwivel jacks also offer these easy-to-use features: Easily pivots between horizontal towing and vertical operating positionsReduce cranking to a minimum when disconnecting from towing vehicleLocking mechanism is spring loaded. Dutton-Lainson swivel marine tongue jack for boat and other trailer applications2,000 lb. capacity12" total travel29-1/2" maximum tongue heightSide wind handle with extra heavy screw drive and ergonomic handle gripUnique articulating high density plastic foot with steel bracketsEasily swivels up for towing or down for stowing and locks in place in either positionU.S. patents 10611201, D870598, D871973, D871974, D871975, and 11173760Fits square tongues up to 3" x 4"Includes all necessary bolt-on mounting hardwareMade in the U.S.A.In addition to the standard D-L marine jack features listed above, the DLx-SF marine jack also offers this set of exclusive features.