On Stage Brand The ERGO-LOK technology, the same hefty tubing as the KS7290 and a double-X frame makes this rugged stand a force to be reckoned with. The patented ERGO-LOK Technology includes an ergonomic trigger, an internal rod mechanism and a solid-steel spring-loaded deadbolt assembly. Simply squeeze the ergonomic trigger to disengage the clutch, position the stand at any of its five convenient height adjustments, and release the trigger to reengage the clutch. This model includes Lock-Tight construction. Made for large format keyboards. Specifications: Tubing: 30mm Weight Capacity: 320 lbs. Height Adjustment: 27 -38 Base Spread: 12 -32