T-Square Drafting Tool - Precision Drawing Instrument for Architects & Engineers #3724463 (License: Personal Use)

This black-and-white technical illustration depicts a traditional T-square, featuring a long straightedge (blade) perpendicular to a shorter head piece, secured with four visible screws for adjustability. The head is designed to slide along the edge of a drafting table, while the blade provides a stable guide for drawing perfectly horizontal lines. A circular hole near the blade’s end aids in hanging or alignment during use.

Commonly used in architecture, engineering, and technical drafting education; this image serves as an instructional diagram on drafting tools, often appearing in manuals, museum exhibits, or online learning resources about analog design methods.