This A-frame non-wheeled manual trailer jack has a 5000 lbs ultra-strong load capacity. Its thickened inner and outer carbon steel tubes with a zinc-plated base are durable. It offers 11-37.5 inches custom height, 7-hole adjustment, and a smooth screw rod. Easy for one-person installation, suitable for RVs, utility trailers, yachts, etc. | Vevor | | 5000 lbs A-Frame Trailer Jack,15-Inch Vertical Travel, Trailer Lift Jack with Adjustable 7-Level Drop Leg & Drill Socket | Silver;Black | Best Buy