The T-550 is a heavy duty, double braced “X” type keyboard stand equipped with our Trigger Lok height adjustment system.  The 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 from the top tiers without having to push or pull any knobs or buttons on the center disc, but simply by squeezing the trigger and releasing it once the stand is positioned at the desired.  The single-tier T-550 is also easily expandable by adding optional QLX/1 adjustable-Second-tier or any of the available QLX accessories.