These adaptors are incredibly robust compact bits of kit survived many drops and scrapes. Due to the ends being the same size as a standard 'D series' connectors they can be easily mounted inside a rack strip to act as a feedthrough. Well worth the money! As you would expect from Neutrik, all connections are firm and of a high quality and can put up with all abuse thrown at them on most events. I have used them in both a media server to directly output balanced audio directly from a motherboard as well as for a point for small scale DJ's at local venues to plug their kit into directly to ensure the system is electrically isolated and protected.