The TeleLock® Series speaker stands from Ultimate Support are extraordinarily strong yet lightweight due to its over-sized heavy wall aluminum tubing. They re everything you d expect from an Ultimate Support speaker stand – they re strong, sturdy, lightweight, 100% field serviceable, and easy to set up and take down. However, the TeleLock® collar gives the user the ability to safely raise or lower the stand WHILE a speaker is on it thanks to the Auto-lock technology that securely grips the telescoping tube in place as you set its height.