Bal's heavy-duty steel scissor stabilizing jack fits most RVs regardless of the ground clearance. Extends from 4" to 24". Tooth gear designed scissor arms engage to ensure straight-line vertical extension and retraction. Easy operating crank handle turns a double lead acme threaded drive screw for quick raising. Black rust inhibitive coating on the jack and shiny zinc-plated handle ensures long life. May be mounted in front or rear. All mounting hardware is included or RV scissor jack can be welded to trailer frame. Set of 2 jacks; crank handle included. 5000 lbs. lifting capacity. No matter what type of camper you have, keep in mind that a new set of scissor jacks is going to help you get it level while camping because you don't know what type of obstacle you will run into while trying to get your camper level.