K&M 21467 Ring Lock Speaker StandAn exceptional aluminum speaker stand with a unique patented expanding mandrel system that provides a stable, tight and firm fit for 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. The height is adjusted by an easy to use spring loaded bolt and locking screw. Double foot