A Yato 180 mm Alluminum Alloy Set Square, YT-70786 also known as an aluminum set square or aluminum angle square, is a precision measuring and layout tool used in woodworking, metalworking, engineering, drafting, and various other applications. It is designed to accurately measure and mark angles, check for squareness, and lay out precise lines and dimensions on workpieces. Here are some key features and characteristics of an aluminum alloy set square: Material: An aluminum alloy set square is typically made of lightweight yet durable aluminum alloy, which offers strength, rigidity, and resistance to corrosion. Aluminum is favored for its stability and ability to maintain precise dimensions over time. Construction: The set square consists of a flat triangular blade with two perpendicular arms forming a 90-degree angle (right angle) along one edge. The blade is precision-machined or extruded to ensure straightness and accuracy. Right Angle Reference: The primary function of an aluminum alloy set square is to provide a reference for creating or verifying right angles (90-degree angles) in woodworking, metalworking, and engineering projects. The tool's 90-degree angle allows users to check the squareness of corners, edges, and assemblies. Measurement Guide: Many aluminum alloy set squares feature markings along the edges of the blade, typically in inches, centimeters, or millimeters, that serve as a measurement guide for laying out and marking dimensions on workpieces. These markings allow users to accurately measure and mark lengths, widths, and depths for cutting, drilling, and assembly tasks. Angle Measurement: In addition to measuring right angles, some aluminum alloy set squares also feature markings or provisions for measuring and marking other common angles, such as 45-degree angles, 30-degree angles, and 60-degree angles. This versatility allows users to accurately lay out angles for various geometric shapes and structures. Versatile Design: Aluminum alloy set squares come in various sizes and designs to accommodate different project requirements and user preferences. Some common types include: Triangular Set Square: A traditional set square with a triangular blade and two perpendicular arms forming a right angle. Adjustable Set Square: A set square with one or both arms adjustable to accommodate different angles and dimensions. Combination Set Square: A multi-functional set square with additional features such as a protractor, spirit level, or ruler for measuring angles, depths, and heights. Durable and Lightweight: Aluminum alloy set squares are lightweight and easy to handle, making them suitable for use in workshops, job sites, and fieldwork. Their durable construction ensures long-lasting performance and accuracy in various working conditions. Overall, an aluminum alloy set square is an essential tool for ensuring accuracy, precision, and squareness in a wide range of woodworking, metalworking, engineering, and drafting projects. By providing reliable right angle reference, measurement guide, and angle measurement capabilities, aluminum alloy set squares help users achieve professional results and streamline layout and measurement tasks.