Stabilize your step assembly with this Stabil-Step Jack. Steel jack easily takes the load off your step tread, mechanism, and frame and lengthens the life of any step assembly. Just twist to extend or retract for storage. Turn the threaded rod at least three full thread turns into the base for proper support. Multipurpose step can be used with RVs, boat docks, around the home, and more. Takes the load off step tread & frame Durable steel construction Supports 750 lbs. | Stromberg Carlson Stabil-Step Jack, 4 5/8" - 7 3/4"