Adequate Protractor For Fixing To The Track

Adequate Protractor For Fixing To The Track

Mechanical bench accessory  09:
Adequate protractor for fixing to the track
The protractor has two sets of measurements. The marking on the inner circle is 0° to 180° in the opposite direction to the markings on the outer circle.
It is an instrument for measuring or constructing an angle of a given measure. It is a circular or semicircular piece of metal or plastic.