Manual-Reading Protractor Manual Reading Protractor Range 0 Degrees to 180 Degrees Graduations 1 Degrees Accuracy +/-0.3 Degrees Material Stainless Steel Blade Length 4 45/64 in Operation Type Mechanical Blade Thickness 0.43 in Finish Satin Chrome Head Length 6 5/8 in Head Shape Semi-Circular Includes Clamping Screw Plastic Case Magnetic Head Yes