Height adjustment range optimized to enable sit-to-stand use of a fixed-height desk when paired with Chief's K1-series dynamic monitor arms, KBD-S2S-19C provides easy placement of the keyboard and mouse for better ergonomic support. S2S keyboard arm provides easy height adjustment range from 7 inch (178 mm) above to 5.5 inch (140 mm) below the work surface to meet the natural typing height of a user whether sitting or standing at the workspace. 19C keyboard clamp tray securely clamps most keyboards and provides optimal ergonomic positioning of mouse tray.