1、[Multi Functions] Combining the features of rafter square and protractor, this tool allows for accurate angle measurement, layout marking, and determination of vertical and horizontal readings, catering to the needs of engineers and carpenters. 2、[Aluminum Alloy Construction] Designed with an aluminum alloy structure, this rafter square tool ensures long lasting performance for both engineering and woodworking projects. 3、[Accurate Engraved Markings] The rafter square features accurate etched markings for enhanced usability and accuracy, making it easy to read and ensuring accurate measurements. 4、[Ergonomic Design] This layout measuring tool offers a comfortable grip and ease of use, supporting efficient and accurate measurements for improved workflow efficiency. 5、[Versatile and Handy] Suitable for a range of tasks from angle measurement to layout marking, this carpentry square tool is a must have for professionals seeking accuracy in their woodworking and engineering projects.