Kensington SnapLock Keyboard Tray with SmartFit Installs under any desk in less than five minutes with no tools, no screws, no drilling. Smart Fit System helps you correctly adjust keyboard for proper ergonomics. Features four height adjustments, 360 degree swivel and tilts from +45 degree to -45 degree for custom comfort. Uses no tools and has only five pieces to assemble No screws, no drilling SmartFit System helps you correctly adjust keyboard for proper ergonomics Adjusts 6 inches in height, +/- 15 degrees in tilt and rotates 360 degrees Installs under any desk--even metal