Protractor with rule, with open arc, LxW 800 x 420 mm. Supplied = assembled. Length = 800 mm. Width = 420 mm. Finish = glare free matt finish. Display type = graduation (mechanical) Measuring device measuring range = 0° - 180°. Product type = protractors. Semi-circular, open arc. With stop screw. Scale division 1°. Scale with large decimal numbers, engraved units. Scale division in black, non-reflective matt finish. Non-rusting steel. Ideal for measuring angular degrees 0 - 180°.