WK-24-1175L and 24-1175R Precision Three-Arm Metal Protractor

Consists of a 6¼” diameter hard bronze circle with one fixed arm and two movable arms. Each arm has an 18” ruler and a 13½” detachable extension ruler. The circular scale is graduated to half degrees with 10 degree markings. Each arm is provided with a vernier reading to single minutes. Four interchangeable pivot plugs are provided for determining and marking the location of the instrument center.

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