The RV industry's first redundant safety check system protects you and your camper from mishap or failure. Hippias's camper jacks feature 2" square powder coated inner and outer legs which are significantly stronger than jacks using round tubes. Rated per ANSI standards, these jacks safely lift an incredible 1500 lbs. (acme screw) to 1900 lbs. (ball screw) per jack! Concave (cupped) footpads reduce movement and provide maximum stability. They can be easily installed / retrofitted onto most campers with Hippias's Z-bracket mounting system (the industry's strongest, most secure bracket system). These amazing jacks are also unique in that they can be easily upgraded from manual, hand-crank jacks to an electric, wireless remote control system with the simple addition of an electric motor drive kit (600725) and wiring kit (600730). A quick-release feature is also available with the ball screw jacks making it the only electric, remote-ready jack with a quick-release option. All this