K&M 213 Winch Up with 213/3 Extension Pole and 21393 Crossbar. 
 
The K&M 213 WInch Up is a high quality steel speaker and lighting stand with zinc die-cast 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.