Just a simple stand to lift the laptop screen a bit higher and put the keyboard at a comfortable angle. Helps keep me from hunching over my computer so much. These were designed for a 15.6" computer, but would probably work for other sizes. Surprisingly stable. I put little pieces of cushioned double sided tape on the bottom to serve as non-skid feet.

Print two, and put one on each side. They also are nice when I have my computer flipped into tablet mode, and am using the stylus.