This Richelieu combination includes the Momentum articulating keyboard arm incorporating dial knob technology for easy tilt adjustment of the keyboard tray - 50074382190 and 504204100.

One of Richelieu's most popular combination Articulating Descending Keyboard Arm and Keyboard Tray - 50074382190 and 504227100. The Momentum articulating keyboard arm incorporates dial knob technology for easy tilt adjustment from -20 degrees to 10 degrees, providing optimal comfort for a range of users. This arm also features Lift-N-Lock technology for effortless height adjustment from 2 3/8 in (60.45 mm) to -6 1/2 in (-165.1 mm) (from top of track), ensuring that this is the easiest, most comfortable, and convenient arm to use.