Patented spring-loaded drop leg 22" total travel. Powered thru 7-way or dedicated common battery w/winch. Sharkskin Premium Finish for optimal corrosion resistance. Corrosion resistant stainless steel internal ACME screw. Easy to install - simply bolt to frame and hook up wiring. Manual override using standard tools in case of power loss. Includes mounting hardware for up to 5" high trailer tongues.