This is our heavy duty 4 tier trimmer rack that can be installed on both open and enclosed trailers. This product is made out of thick ¼ inch steel and heavy walled square tube. Its durablable military grade powder coating finish is strong enough for the roughest conditions. This rack includes 4 individually locking trimmer cradles that will accept most normal padlocks. Each trimmer cradle has a rudder strip to help protect your equipment from vibrations and wear. The cradles are tilted for easy pain free loading. When installed on an open trailer the inside support arms double as a ladder rack. This rack can be bolted or welded on for installation, welding is preferred.