Rocking & Tilting: The tilt-lock mechanism gives you a more comfortable rocking/reclining option other than sitting up straight. You can switch the two modes by simply pulling/pushing the lever to unlock/lock the mechanism. Twist the control knob to adjust the tilt tension of the chair Free Mobility: The 360° swivel seat and wheels provide must-have mobility in your office, making sure you can move freely and smoothly as you rush from task to task, so not even your workflow can stop you