The On Stage Universal 2nd Tier keyboard stand attachment can be inserted into most X-style keyboard stands with round or square tubing. Then, a tightening knob expands the internal locking mechanism that secures the 2nd tier into position. A midpoint clutch featuring two disks with 36 inter-locking teeth lets you tilt the second tier to any position without worrying about slippage. The clutch is made with die-cast zinc adding strength to its grip on the user’s costly gear. An included stabilizer bar keeps the left and right tier members upright when it is properly assembled between the two members. And, because the stabilizer bar telescopes, the width of the entire 2nd tier unit adjusts with your stand.