The top-of-the-line On-Stage Stands" keyboard X stand is built for pro-level playing with super heavy-duty tubing and welded construction. Supports 275 lb. with height adjustment from 27"-39" and width adjustment from 11"-30".Uses ERGO-LOK technology for ease of use. The ERGO-LOK system includes an ergonomic trigger, an internal rod mechanism, and a solid steel spring-loaded deadbolt assembly. Dual sheer disk plates and heavy-duty deadbolt for superior stability. The sturdy 2nd tier with tilt adjustment helps you put your board right where you want it. A midpoint clutch featuring 2 disks with 36 interlocking teeth lets you tilt the second tier to any position without worrying about slippage. The clutch is made with die-cast zinc for added strength. A stabilizer bar keeps the left and right tier members upright when it is properly assembled between the 2 members. And, because the stabilizer bar telescopes, the width of the entire 2nd tier unit adjusts with your stand.