Angle Measuring Ring

I needed to find the angle of a blade and was surprised there wern't any tools to do this.. So I made a ring with angle at 5 degree increaments cutout around the perimeter.

I am not actually sure how useful it is, but figured someone else might like to take a look.

Print in 2 colours if you want to highlight the text.. But use a better contrasting colour than I did, as my text isn't obvious in some lights.