JMR's combo package of Wixey Digital Angle Finder/Level and base plate is a handy tool for finding true bevel angles on a saw, tracking rotation of a tube during tube bending, or setting up milling/drilling operations. The gauge can be "Zero'd" at any point. The small body is only 2x2" and has a strong magnetic base.

JMR-DAF100

JMR Digital Angle Finder