The legs of the desk footrest have non-slip pads at the bottom to keep it stable to ensure its stability and give you a better experience - Best choice foot rest for under desk at work! Six Heights Adjustable Desk Foot Rest: Our under desk footrest are available in six adjustable heights (3.1" to 7.3") to help you find your most comfortable sitting position, the height can be adjusted by rotating the screws on both sides of the footrest under the desk, which is easy to operate - Nice design desk foot rest for office!
eBay