Patented spring-loaded drop leg 22" total travelPowered thru 7-way or dedicated common battery w/winchSharkskin™ Premium Finish for optimal corrosion resistanceCorrosion resistant stainless steel internal ACME screwEasy to install - simply bolt to frame and hook up wiringManual override using standard tools in case of power lossIncludes mounting hardware for up to 5" high trailer tongues