These manual-reading protractors resemble basic school-style protractors. They have a square or round head with a 180° arc marked on the body. Select models include a blade that may be etched with graduations, while others may require a rule or straight edge to read accurately. These protractors are commonly used for woodworking and metalworking applications.
Digital protractors are compact measuring devices that have an LCD screen that shows measurements and has built-in electronic functions like data hold and absolute positioning. With the LCD, there is no need to do visual reading on a standard or vernier scale. These protractors resemble digital levels and are commonly used in metalworking, machining, and light and heavy manufacturing applications.
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