Protractor used for measuring angles, injuries, and lengths. Protractor used for measuring angles, injuries, and length; Scale is etched with etched and black chrome plated so it won't come off. Silver treatment reduces reflections on the surface and makes it easy to read. Since it is a 2-rod type, it can measure up to a sharp angle. Compact size of 3.9 inches (10 cm) is convenient to carry. Product Size: Length: 4.7 inches (120 mm), Width: 1.0 inches (26 mm), Height: 0.2 inches (5 mm); Product Weight: 0.7 oz (20 g); Package Size: Length: 7.3 inches (185 mm); Width: 2.8 inches (71 mm); Package Weight: 1.2 oz (35 g); Material: Body: Stainless steel; Washer: Iron.