The T550 Double Braced Keyboard boasts an ingenious "Trigger Lok" system which houses five positive-lock height positions and is completely sealed exposing no parts. This means that the user can instantly open and close the stand from the top tiers without having to adjust, pull or push any buttons or knobs on the centre disc. You simply squeeze the trigger and then release it once it's positioned at the height you want. The T550 benefits from heavy duty construction with 30 x 30mm steel tubing. The stand can hold keyboards up to 90kg (200lb). This stand is also easily expandable by adding any of the available QLX accessories.