The Libella is a very ancient tool used for layouts and leveling. Mostly forgotten now in this day and age. Recently while making a version of the English Layout Square done by Popular Woodworking I was inspired by a fellow woodworker to add a string and plumb bob to the square, effectively creating what is known as a libella. I had a question on my blog as to its possible usefulness, and I thought that shooting a quick video might be the best way to go explaining the basics of this useful tool.

