QL T 550 KEYBOARD STANDQL T 550 Keyboard StandThe ingenious TRIGGER LOK system designed by QUIK LOK houses five positive lock height positions and is completely sealed exposing no parts. The mechanism allows the user to instantly open and close the stand fromthe top tiers without having to push or pull any knobs or buttons on the center disc, but simply squeezing the trigger and releasing it once the stand is positioned at the desiredConstructed using heavy duty 30 x 30mm