- Regular Blade Finish; graduations: No. 4R: 1/8", 1/16", Quick Reading, 1/32", 1/64"
- Direct reading 0-180 degree in opposite directions, permitting the direct reading of angles and supplementary angles
- Protractor heads are made of stable cast iron and finished with a choice of attractive black wrinkle finish; tempered steel blades with accurate, machine-divided graduations
- Reversible lock bolt allows choice of which graduated side of the blade faces the operator
- A spirit level indicates when the base reference surface is level-a feature not usually available on comparable rotractors
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