Place the Safco Stance height-adjustable laptop stand on top of your sit-down desk or table and instantly turn it into a standing-height workstation for your laptop computer. Use the pull-knob on the back of the stand to adjust The laptop platform in increments of 1-3/8" To a height that's right for you between 1-1/4" And 15-3/4". When you want to return to working in a sitting position at your desk, either re-adjust the platform to its lowest Height, or simply move the lightweight, free-standing stance out of the way and reclaim your desktop. Made with a laminate platform and black powder-coated steel base for long-lasting durability, the stance laptop stand helps give you the means to get up out of your chair more throughout the day while staying engaged with your work. And to make your new standing workday more comfortable for your feet and legs, Put a Safco contoured anti-fatigue mat (sold separately) between you and that flat office floor.