Mead-Hatcher Lift-N-Loc Articulating Keyboard Arm, 360 Degrees swivel and a 30 Degrees Positive/Negative Tilt Range, Black (MATKA150) To adjust height, just lift and move tray into position 7 Inches total height adjustment and 25 Degrees total angle adjustment 360 Degrees swivel Low profile design gives more leg room Spacious 28 x 12.5 Inches wood platform accepts standard or ergonomic keyboards with mouse tray that attaches on right/left side