T-square

A T-square is an adjustable tool used in drafting and design to draw straight, precise lines. It consists of a longer blade and a shorter crosspiece (the T), which form a “T” shape. The crosspiece slides along the blade, allowing you to set and maintain a fixed angle, usually 90 degrees. Once positioned, it helps create accurate perpendicular lines or extend straight edges on drawings. Essentially, a T-square ensures consistency and precision in technical sketches, blueprints, and architectural plans by providing a reliable guide for straight lines and right angles.