Mini Fixed Angle Gauge

Sometimes, I find myself needing to measure angles in very tight spaces in which I am unable to use a conventional angle meter. Even though this approch lacks some precision due to the limited amount of preset angle, this helps me a lot to find the correct angle faster. Obviously this approach is limited in regards to how small of an angle you can cover. The current limit is 20° to 90° and 90 to 145° if you make use of the top left corner that is not marked (180° minus the marked angle). This wi