This is what a fairly accurate protractor looks like. Most protractors have one mark on their scale for each degree. This one has a Vernier scale (explained in the section on calipers) that lets you read the angle to within one minute of arc, which is 1/60th of a degree.
Location: Box U100
Have you used this tool? Think my description is all wrong? Have a better example? Comment now with any thoughts you have about this tool!
