[Main function 1: Drawing Angles]---- With this precision wooden protractor, you can draw angles from 0 to 180 degrees with an incredible accuracy of ±0.5°. Noticed : When you trace, the blank "arrow" on the steel ruler body helps you indicate the exact angle. Improve your woodworking with ease and precision! [Main function 2: Measuring and Marking Lengths]---- Equipped with a 304cm ruler, this wooden marking protractor not only allows you to measure lengths from 0 to 30cm, but also quickly mark a vertical line based on the desired distance. With its clear double-sided laser markings in centimeters and inches, reading is child's play. Give yourself greater efficiency in your projects thanks to this versatile tool. [Main function 3: Draw Circles]---- Unleash your creativity! This protractor even allows you to easily draw circles using its upper part as a fixed center, with a maximum radius of 30 cm. Let your imagination run wild and create perfect circles with high precision. [Quality Materials]---- Made of durable metal steel and equipped with an ABS protractor, this marking ruler is designed to offer optimal reliability. Quality materials ensure exceptional durability, making this protractor a reliable companion throughout your woodworking projects. [Usage]---- This versatile tool finds its place in many areas of woodworking. Whether for complex mortise and tenon joints, mechanical processing operations, architectural drawing work, DIY or construction projects, this precision protractor is essential. Use it to measure angles, trace lines, draw shapes, etc.