The Workrite Ergonomics 2191-22 Standard Platform Adjustable Keyboard System w/Split-Pad Palm Support is a CB-185-25 platform with pinnacle 2 value arm on a nylon glide track. The platform has a classic 0.625" melamine platform and a mouse-trap that keeps the mouse in position. The arm will provide maximum knee clearance with a height range of flush to 6" below the worksurface. It also features a 360° swivel-easy positioning and storage with a tilt range of -15° to 10°. This platform features a split-pad palm support providing one for the keyboard and one for the mouse.