High-quality materials: The ruler of this protractor is made of stainless steel and laser-engraved with graduations on both sides. It is clear, easy to read, and durable. With a thickness of 2 mm, it is lightweight and durable. Multifunctional angle ruler: Our protractor measures length and angle, and can also draw 180° lines. Clear and precise, it allows you to easily measure angles, draw straight lines, and measure depth. Adjustable protractor: This protractor has centering and marking functions and is equipped with an adjustment screw. By locking it in the desired position, you can quickly and accurately identify angles and draw straight lines. It is ideal for setting bevels, drawing radial lines, measuring, and marking angles. Widely used: This adjustable protractor is suitable for engineering, angle measurement, student drawing, architectural design, and length measurement. It's a powerful tool for craftsmen, designers, artists, and engineers. Easy to carry: The protractor is small and lightweight, versatile, and easy to carry. It's a perfect gift for fathers, men, and women who work in woodworking, construction, and engineering.