Sisyphy Ergonomics Desk Extender Tray, 25.2x9.5" Punch-Free Clamp on, Foldable Keyboard Drawer Tray, Table Mount Arm Wrist Rest Shelf, Computer Elbow Arm Support. 【Space-Saving & Foldable】 When not in use, the tray can be folded down under the desk, effectively saving space and keeping your workspace tidy.
eBay