Open Center Protractor, Plastic, 6" Ruler Edge, Clear, Dozen

Open-center plastic protractor perfectly fits the needs of young mathematicians. Black-scored graduations molded into the transparent frame ensure crystal-clear measuring. Ruler base lists both metric (centimeters) and standard (inches) systems. Degree Graduations: 1°; Material(s): Plastic; Ruler Size: 6" Ruler Edge; Color(s): Clear.