Starrett 491-18-4R 491 Series reversible bevel protractor with 18" blade, 0 to 180 deg measuring range, and 4R graduations including 8ths, 16ths, quick-reading, 32nds, and 64ths. Cast iron body with black wrinkle finish. Blade measures 1" wide by 3/32" thick. Suitable for precision angle measurement and layout work.

Starrett Bevel Protractors have revolving turrets with direct reading double graduations a full 0 to 180 Deg in opposite directions. This permits direct reading of angles above or below the blade. Equipped with a handy spirit level. 18", 4R Grad, Reversible, Black Wrinkle.

Features

• Direct reading 0 - 180 deg 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 or smooth black finish
• Tempered steel blades with accurate, machine-divided graduations
• A spirit level indicates when the base reference surface is level - a feature not usually available on comparable protractors
• Reversible lock bolt allows choice of which graduated side of the blade faces the operator
• Reversible, there is a shoulder on both sides of blade, allowing the tool to be reversed so the same angle can be scribed or measured left and right
• Regular finish blade
• 3-1/4 in H x 1-9/64 in W