SPI 30-393-3 Rectangular Head Protractor: 6" Blade Length, 180° Measurement, 1° Dial Graduation
- Protractor arm (blade) is 6 inches long; head is 3-3/8 inches wide by 2 inches high.
- Permanently etched graduations from 0 to 180 degrees in opposite directions
- Used by machinists, draftsmen, mechanics, and engineers for setting bevels and transferring angles
- 180° Max Measurement, 1° Dial Graduation, Accuracy Up to 30 Minutes, 0 to 90 to 0 Dial Range.