The Pro Series EJ1000 Bolt-On Trailer Jack is designed with a heavy-gauge steel construction and sidewind crank to provide a smooth lift experience. This bolt-on model comes with all of the hardware and mounts that will fit up to a 3 x 5 in. trailer frame. The Pro Series EJ1000 is made with a dependable design that will lift up to 1,000 lbs., making it ideal for many small boats.