A T-square ruler is a specialized type of ruler that is commonly used in drafting, drawing, and other technical applications. It consists of a long, straight blade or edge, usually made of metal or plastic, with a perpendicular crosspiece at one end that forms a "T" shape.
Lance T-square rulers are typically used to draw straight lines and to ensure that lines are drawn at right angles to the edge of the paper or drawing surface. They are often used in conjunction with a drawing board, which provides a flat, smooth surface for drawing and helps to keep the paper or other drawing surface in place.
To use a Lance T-square ruler, place the long edge of the blade or edge along the edge of the drawing board or other flat surface. Hold the ruler in place with one hand and use the other hand to guide a pencil or other drawing instrument along the edge of the ruler to draw a straight line. The perpendicular crosspiece at the end of the ruler can be used to ensure that the line is drawn at a right angle to the edge of the paper or drawing surface.
Lance T-square rulers are available in a variety of sizes and materials, and may have markings in different units of measurement such as inches, centimeters, or millimeters. When choosing a T-square ruler, it is important to select one that is appropriate for the size and type of drawing or drafting project you are working on.
T-square rulers can also be used in combination with other drawing tools such as triangles and protractors to create more complex shapes and angles. They are an essential tool for anyone involved in technical drawing, architecture, or engineering, and can be used for a wide range of applications including drafting blueprints, creating technical illustrations, and designing plans for buildings or other structures.