Add functional storage to your stand up desk with the Clamp-On Under Desk Headphone Holder / Backpack Hook / Purse Hook. Offering a 30 lb. capacity and designed to easily clamp on to practically any desktop or shelf between 0.6" and 1.5" thick, it provides an easy way to help maximize the unused space beneath your desk or shelf, while reducing desktop clutter. The thumb screw clamp features foam padding to protect the desk or shelf surface, and provides effortless, tool-free installation. The hook is reversible, allowing you to hang items directly beneath the desktop or shelf, or off the front or side edge. Durable steel construction and powder coat finish will provide years of dependable service. Sized for easy use as a purse hanger, headphone stand, or backpack hanger.