1、Multifunctional: This hole position scribing ruler is designed to quickly and accurately measure or mark angles between 0 and 90 degrees, and includes preset angles of 22.5°, 30°, 45°, 60°, 67.5°, and 75°, as well as corresponding 1/4 diameter holes for angle pins. 2、Laser Printed Graduated Lines: This multi angle measuring ruler features laser printed graduated lines to ensure accuracy and longevity. Coated with protective powder, these markings are clear, easy to read and hard wearing, making them the perfect tool for woodworking projects. 3、Compact And Portable: This carpenter square hole scribing ruler is small in size and light in weight, which is easy to disassemble and carry, you can easily mark or check the lines on the board, it's very convenient to carry and use. 4、Excellent Alloy Aluminum Material: This multi angle measuring square ruler is made of excellent alloy aluminum material with multiple polishing process and sleek appearance to ensure user security and durability. 5、Wide Application: This hole scribing ruler can be used for a variety of materials such as round, 3D workpieces, square lumber, pipes, etc., perfect for handcraft enthusiasts, engineers, carpenters, and decorators, great woodpecker tool for carpentry, engineering, and construction tasks.