The revolutionary dual paddle mechanism for height and tiltExtended Adjustable Keyboard System with Comfort Plus Platform design PP Platform features include: Comfort Plus keyboard platform with non-skid pads and snag-free contoured underside Injection molded construction for platform 18" gel palm rest 21" track MPG Mouse Tray features include: Independent tilt and swivel mouse tray Interchangeable for left or right handed use (no tools required) Swivels over keyboard for tight under desk storage Integrated gel palm rest/mousepad Under surface cable management system T21 21" Track AKP75 EZ-touch paddle adjustments for both height and tilt 9-1/2" of height adjustment 2-1/2" above the surface (AKP75) 15º +/- tilt with 360-degree swivel EZ-Glide glide and ball bearing track Cable management system Permanent user guide Steel construction with durable powder coat finish Positive tilt lockout kit available EZ-Specs include: 2KEY-3 - AKP75, T21, PP1824, MPG 2KEY-7 - AKP75, T21, PD1824, AMS 2KEY-31 - AKP75, T21, PC2524 2KEY-41 - AKP75, T21, BBP1824