Ergonomic clamp on mouse tray swivel under desk attachment adjustable, Horizontal 360 degree rotation the mouse pad under-desk, Clip it on the desktop, turn the screw to tighten the screw, no tools are needed, and the desktop will not be damaged.Desk mouse tray rotating clip on mouse tray with clamp attachment , Sturdy metal clamp fits onto desks up to 5cm / 2inch", Please pay attention to the size of the clip, it is not compatible with all desktops, please pay attention to the precautions in the description, the unsuitable desktop will cause the product to be unstable.Adjustable mousepad desk mouse holder extension trays with clamp mouse shelf clamp on, Loads up to : 2.2 lbs, Rotating steady mouse tray attachment clamp on for desk computer mouse platform pads , Space saving mouse platform under desk, horizontally rotates 360 degrees to hide it under the desk, Easy to use in multiple angles and can be horizontally rotates under the desk when not in use.Computer mouse extender mount tray clip on under desk extension for mouse attachment for office/ home use small mouse holder for desk clamp on , 3 Section Heights Adjustment , Easy to Attach: With the Screw-on Clamp, it can be installed without any tools. 3.15 inches below your work surface once attached. Please notes: It is recommended that the thickness of the desktop should not exceed 5cm/2inch, The tabletop is bumpy/ Edge with decorative strip /The edge slope is too large, which will cause the clip to be unstable or fall off.