Unshakable and sturdy! This K&M 21368 high quality, height adjustable distance rod is a guarantee for a secure, stable and quiet connection to satellite systems. The height is adjusted by an easy-to-use spring-loaded bolt and locking screw. The distance rod is connected to the subwoofer using the M20 threaded bolt. The unique patented expanding mandrel system provides a stable, tight and firm fit for satellite speakers. The movable plastic splints provide for a vibration-free connection between the rod and the speaker. Connecting the speaker is easy and is done using the handy ring lock - which is simply placed in position and screwed on.