Fellowes Professional Series Compact Keyboard Tray (8018001) Provides comfort and maneuverability for smaller workspaces Designed and manufactured for Fellowes by Humanscale Lift and lock feature lets you adjust height with one hand  tilt platform to reposition, then straighten to lock in place Single manual knob adjusts tilt up to -10 degrees for optimal comfort Warning Trak helps prevent mouse from sliding off mousing platform