General Tools Square Head Protractor

General Tools and Instruments 17 Steel Square Head Protractor is a heavy-duty steel protractor that is trusted by machinists and draftsmen worldwide to deliver crucial measurements with unwavering accuracy. The 6″ adjustable arm is ideal for setting bevels, taking measurements and transferring angles. Ultra-fine etched graduations read from 0 to 180 degrees in forward and reverse directions, and will not wear or rub off. Made of ground stainless steel for precision and durability.