This is ourExtendedreach Mic boom model witha45 total reach. It was originally designed exclusively for RCA and includes two long armatures and adjustable spring tension points. By adjusting the spring mounting point, you can increase spring tension. Consequently, it can hold heavier microphones, without the need to purchase new armatures or springs. It has a5/8-27 threaded mounting stud.Additionally, an integrated wire channel is included with easy placement top cap for super fast wire installation. Most importantly, no cutting or rewiring is needed. Installation takes no time: Just lay the wire into the channel, install the press-fit cap, and you are ready to go.