Our motorboat stands have been independently tested and are certified to a safe working load of 20,000 lbs. (9,100 kgs). In our 60+ years, a Brownell stand has never failed. Our products are widely utilized throughout the world to help people work more safely and more efficiently. Our adjustable stands feature a precision-cut Acme threaded, solid steel center rod for easy adjustment even under load. They feature a vertical base with a top that swivels to 25-degrees to fit most hull shapes. When not in use, the motorboat stands stack neatly for storage. The system is simple. Most of the vessel's weight rests on its keel on either wood blocking or keel stands. The boat stands safely balance the load when used properly; one stand every 8' to 10' (3 meters) along each side of the boat.