Just clip it to the edge of your table and screw it on. (Tray not included, desktop extension not included). 【Adjustable Range】: Foldable Keyboard Drawer Tray Clamp mount, the adjustable range is 0.5cm-9.5cm, suitable for tables of different thicknesses.
eBay
HOMCOM Movable Computer Desk with 4 Moving Wheels Sliding Keyboard Tray Black
Aliexpress UK
【Saving Desk Space 】Remove the keyboard and mouse from the desk and place them on a pull-out keyboard tray to free up valuable work space. By sliding the keyboard under the desk when it is not in use, it provides a way to save space.
eBay
Computer Desk Mobile, Portable Office Desk with Movable Wheels,Height Adjustable Study Desk,Home Office Desk with Keyboard Tray
Aliexpress UK
⌨SAVES DESK SPACE : This under-desk keyboard tray expand more space for holding your keyboard, mouse, and other small accessories below the desktop. ⌨ERGONOMIC SMOOTH GLIDING TRAY : Easily slide the tray in and out.
eBay
HOMCOM Compact Small Computer Table Wooden Desk Keyboard Tray Storage Black
Aliexpress UK
【Saving Desk Space】Remove the keyboard and mouse from the desk and place them on a pull-out keyboard tray to free up valuable work space. By sliding the keyboard under the desk when it is not in use, it provides a way to save space.
eBay
Modern Desk with Power Outlets LED - 120x50cm Computer Table Gaming Desk, Keyboard Tray, 4 Reversible Drawers
Aliexpress UK
⌨EASY TO ASSEMBLE : All necessary hardware and instructions are provided for assembly, you only need to fasten the clamp with 4 screws to complete the installation. This process takes only 2 minutes.
eBay
Height Adjustable Folding Standing Computer Desk with Keyboard Tray for Home Office Gaming Lift Laptop Table Stand Workbench
Aliexpress UK
【Saving Desk Space】Remove the keyboard and mouse from the desk and place them on a pull-out keyboard tray to free up valuable work space. By sliding the keyboard under the desk when it is not in use, it provides a way to save space.
eBay
Modern Wood Desktop Computer Desk With Keyboard Tray PC Laptop Desk For Study Student Writing Table Home office Work Furniture
Aliexpress UK
A large desk drawer adds valuable extra workspace to your office. 【UPGRADE STEEL SLIDING TRAY】Heavy-duty steel smooth sliding rail design allows the desk drawer to glide smoothly forward and backward.
eBay
Height Adjustable Folding Standing Computer Desk with Keyboard Tray for Home Office Gaming Lift Laptop Table Stand Workbench
Aliexpress UK
Bearing Weight: 25kg. Whether to Install: No. Whether to Punch: No Punch. Colour: Black.
eBay
HOMCOM Computer Office Desk Table Workstation w/ Keyboard Tray, Drawer, Black
Aliexpress UK