Nobody wants their boat or utility trailer rolling off into the sunset. With the Bulldog Powered A-Frame Trailer Jack your receiver-style trailer will stay grounded when it s not in use. With a 4 000-pound lifting capacity this electric trailer jack can be used for a variety of agricultural and commercial applications. In case of power loss there is an emergency manual override feature and crank included so you are able to still utilize your jack. Whatever receiver style trailer you own put your mind at ease with a powered jack that keeps your trailer put when not in use.