The US Series is the ultimate in rackmount technology with its roto molded tuff shell, and the recognizable patented deep Roto-X pattern for stacking. The ergonomic molded carrying handles allow for easy transportation of your line mixers, microphone systems, CD players, as well as other audio and video equipment. The unique molded-in unbendable valance and steel threaded rails with self tapping screws make the US Series racks convenient to use and the most durable.