Fellowes® Professional Series Premier Keyboard Tray with Comfort-Lift™ system lets you slide mouse platform left or right over keyboard numeric pad and offers 2 custom height positions. Designed and manufactured for Fellowes® by Humanscale®. Mouse platform tilts forward or backward, adjusts up or down, and mounts on left or right side of keyboard tray. Warning Trak™ helps prevent mouse from sliding off platform. Lift and lock feature lets you adjust height with one hand. Single manual knob adjusts tilt up to -10 degrees for optimal comfort. Health-V™ memory foam supports with Microban® antimicrobial protection stay cleaner and relieve wrist pressure to help prevent carpal tunnel syndrome. Durable platforms withstand daily use and feature non-skid pads. Slim profile fits standard workstations.