ARKSEN 12-Volt, Electric Power Tongue, A-Frame RV Trailer Jack, Adjustable Height - 3500 LB A must have for all Travel Trailers from Utility Trailers to Boat Trailers Removable foot pad; Raise or lower trailer Easy operation hand crank in case your battery goes dead Fits 2" & 2 1/4" standard Trailer tongue mounting hole Height: Adjustable; Lift Weight Capacity: 3,500 LBS