Usually, bevels do not have any graduations. Universal or bevel protractors have a base arm and blade with a wide angular range. Bevel protractors have a graduated, angular, direct reading, or Vernier ...

His build [PDF] is fairly straightforward: a high-resolution digital servo rests inside the bevel protractor while a motorized potentiometer, accelerometer, and µOLED display form the calipers.

Sine blocks are wide sine bars. Sine tables or plates use a plate that is hinged off an attached base. Universal / Bevel Protractor Universal or bevel protractors have a base arm and blade with a wide ...