Manual-Reading Protractor Manual Reading Protractor Range 0 Degrees to 180 Degrees Graduations 1 Degrees Accuracy +/-0.3 Degrees Material Stainless Steel Blade Length 11 13/16 in Operation Type Mechanical Blade Thickness 0.78 in Finish Satin Chrome Head Length 16 1/4 in Head Shape Semi-Circular Includes Clamping Screw Plastic Case Magnetic Head Yes