K&M 21302 Crank-up Speaker StandA high quality steel speaker stand with plastic clamps for professional use. Infinitely variable height adjustment with a hand crank and push button system which prevents an uncontrolled reverse motion. There is an additional locking screw for extra safety. Extension tube diameter 35 mm, suitable for speakers and lighting crossbars with an integrated M10 thread connector. Features: Manufacturer: Knig & Meyer Elevator tripod: Yes Material: Stahl