L.S. Starrett 490 and 491 Series Reversible Bevel Protractors
Direct reading 0-180° in opposite directions, permitting the direct reading of angles and supplementary anglesProtractor heads are made of stable cast iron and finished with a smooth black finish or wrinkle finishReversibleReversible lock bolt allows choice of which graduated side of the blade faces the operatorSatin chrome blades and protractor headsshoulder on both sides of blade allows tool to be reversed so same angle can be scribed or measured left and rightSpirit level indicates when the base reference surface is levelTempered steel blades with accurate, machine-divided graduations