Description: Premium MaterialThe Rafter Square is made from premium acrylic, ensuring wear resistance, durability, and long term use. Its smooth design and accurate etching marks allow for simple and accurate measurements.SizeThe Triangle Ruler Rafter Square Protractors measures 7cmx8cmx1cm/2.76inchx3.15inchx0.39inch.Rafter Square ToolThe rafter square tool allows you to conveniently and accurately measure the angles and layout of your engineering and woodworkings projects.Multifunctional Measuring ToolThe triangle ruler rafter square is a multifunctional tool that combines the functions of a rafter square and protractors. Whether you need to measure angles, mark layouts, or determine plumb bob readings or level readings, this tool can meet your needs. Its ergonomic design and clear markings ensure ease of use and accuracy.for Engineers and CarpentersThe layout measuring tool is specifically designed to meet the needs of engineers and carpenters, and enables efficient measurement tasks. Size Chart: 7cmx8cmx1cm/2.76inchx3.15inchx0.39inch Package Includes: 1 Rafter Square Tool Note: Please allow slightly errors 1-2cm differences due to manual measurement.