Precision Protractor with Vernier Scale - Engineering Measurement Tool #224306 (License: Personal Use)

This technical diagram depicts a vernier protractor-a precision instrument used to measure angles with sub-degree accuracy. The device features a semicircular main scale graduated from 0° to 180°, a movable arm with a secondary vernier scale (0-30′), and a locking mechanism for stable readings. The central pivot includes crosshairs for alignment, making it ideal for mechanical drafting and quality control tasks.

Commonly used in engineering manuals, technical education resources, and CAD/drafting tutorials; this image supports user intent around learning or selecting precision measuring tools for fabrication, surveying, or instructional purposes.