Vernier protractors like the Starrett Universal Bevel Protractor No. 359 increase resolution to greater than a nominal degree.GǪ
Steel protractors typically have a resolution to 1 degree.
Steel protractor depth gages offer the angular measurement of a protractor and utilizes the precision ground edge to reference a depth measurement.GǪ
Bevel protractors capture angular measurements with an adjustable 360 degree protractor head.