Lever-free lift and lock mechanism enables easy height adjustment. And the unique sit/stand feature allows for more variation in work positions, helping to reduce the chance for repetitive stress injuries. Compatible with ergonomic keyboards. For corner workstations or straight-on workstations that accept a 23"" track. - Lever-free lift and lock adjustment for height. Just tilt the platform to release, then un-tilt to lock in place. Tilt adjusts with separate lever. - Keyboard platform can adjust left and right to fine tune the exact position of the keyboard. Great for situations where there is an obstruction beneath the work surface forcing the track to be mounted off-center from its ideal location. Simply loosen red knob and adjust. - Gel wrist rests for keyboard and mouse platforms add comfort by minimizing pressure points. Leatherette cover lasts longer than fabric-covered wrist rests and is easier to clean. - Super adjustable separate mousing platform mounts left or right and needs no tools to adjust. Platform slides left and right over the keyboard, tilts forward and backward and adjusts up and down to the same level as the keyboard platform. Features 3M™ Precise™ Optical Mousing Surface.