Scissors jacks provide fine leveling and stabilizing for travel trailers and 5th wheels. Given the broad range of ground-to-frame clearance, there's a Bal leveling jack for almost every RV. The Standard Scissors Jack provides a sandwich construction bearing design to assist in screw operation. Tooth gear design of the scissor arms ensures straight line vertical extension and retraction. Double lead, acme thread drive screw is designed so the jack raises quickly and the crank handle turns easily. When placed in the handle receiver, the crank handle can be easily rotated, even when tilted. Rust-inhibitive E-coating on the jack and shiny zinc coating on the crank handle ensure long life. Mounting hardware is included, jacks may be welded to trailer frame.