Ergonomic keyboard platforms for every BODY and every BUDGET. The Mouse Over and Under design features an articulating mouse mechanism. The Platform is a 20" cockpit design with slots cut on both sides of the platform for the Mouse Over/Under mechanism. The slots allow for quick change from the right to left handed mouse position. The articulating mouse mechanism can be installed on both sides for left or right handed use. Mouse platform has independent pivot and 15 degree positive and negative tilt and can be positioned over, under or in alignment with the keyboard tray. Works well in tight corners and straight workstations.