Manual-Reading Protractor, Manual Reading Protractor, Range 0 Degrees to 180 Degrees , Graduations 1 Degrees , Accuracy +/-0.3 Degrees , Material Stainless Steel, Blade Length 7 29/32 in, Operation Type Mechanical, Blade Thickness 0.63 in, Finish Satin Chrome, Head Length 11 1/4 in, Head Shape Semi-Circular, Includes Clamping Screw, Plastic Case, Magnetic Head Yes