A neat little protractor that doesnt fall apart for measuring all those odd little corners in life.
"This is a protractor for measuring corners. For instance it can be used to determine the angle between two walls. It has the advantage of being able to push up against two flat surfaces as opposed to a regular protractor that is more of a 2 dimensional approach to measuring angles.
To complete the protractor, you will need two main arms one gauge arm, one cross arm and the protractor piece."
The author remixed this model.