BONTEC Desk Extender Tray, 11.8"x5.9" Table Mount Arm Wrist Rest Shelf, 90°Foldable Elbow Support, Clamp on Computer Arm Rest for Desk, Office & Home Use, Durable & Easy to Install

This is a great shelf. I have a folding table (wood not Plastic) that I have my compute on. I needed some more space so I got this and the one for the keyboard. The attach nicely. There is Assembly required. You have to screw the bracket with the thumb screws to the bracket that hold the shelf. And there are options for thin or thick table tops. Mounts to the table nice and strong and level with the table top. Also folds down if you need to get it out of the way. Might be too small for a mouse, I use trackballs instead of mice.

Easy to install and I got the additional space I was needed in my office. Matches my keyboard tray.

Great extension for my desk for my laptop freeing up space for other work items.

I bought this about a year ago and it is still holding up strong! The side padding has slipped a little, but otherwise is still really strong and it has no issues whatsoever.

It does the job. If your desk doesn't have a straight edge it may not hold properly, though. The clamps are fine, I had to put a piece of 1x3 under the tabs on top to hold it in place on the beveled/chamfered edge of my desk. Not exactly the end of the world, but longer tabs would make this compatible with more desk designs.

Works great. Very stable. Easy to use. Added some needed space on my small work table.

I bought this to attach to a shelving unit to hold a Mesh router node. The screws that hold the unit in place are versatile enough to fasten around the metal shelf support and grab onto the shelf itself. It feels really sturdy.Was also easy enough to put together.

Perfect!