1INNOVATIVE TOOL: Rafter square tool is designed with innovation in mind, allowing you to conveniently and accurately measure angles and layouts for your engineering and carpentry projects 2ACCURATE AND PROFESSIONAL: The rafter square tool is specifically crafted to meet the needs of carpenters and engineers. With high accuracy aluminum alloy construction, this tool ensure accurate measurements and layouts every time. Long lasting design guarantee long lasting performance, making it an essential addition to your toolbox 3STURDY MATERIAL: Adopt quality aluminum alloy, triangular ruler offer exceptional durability and accuracy. Its delicate design and accurate etched markings allow for easy and accurate measurements 4MULTIFUNCTIONAL MEASURING TOOL: Triangular ruler rafter square protractor is a versatile tool that combine the functionality of a rafter square and a protractor. Whether you need to measure angles, label layouts, or determine vertical and horizontal readings, this tool has got you covered. Ergonomic design and clear resolution markings ensure ease of use and accuracy 5WIDELY USED: Layout measuring tool is specifically designed to meet the needs of engineers and carpenters. With ease of use and high visibility markings, this tool enables efficient measurement and layout tasks 1 x Triangular Ruler 1 x Clamping Block 1 x Fixing Screw