1、2 MEASUREMENT SCALES: The ruler has both imperial and metric measurement scales (mm). Regardless of whether you prefer using the imperial or metric system, our angle ruler can cater to your measurement needs. 2、ACCURATE SCALES: The angle ruler features a high accuracy laser engraved dial with clear white markings that contrast with the red background, ensuring easy readability and improving the efficiency of your woodworking process, saving you time. 3、2 IN 1 DESIGN: Our architectural angle ruler combines the functionality of a ruler and an angle measurement tool. Woodworkers can measure angles ranging from 0 to 180 degrees, providing accurate guidelines where needed. The ruler can measure lengths from 0 to 30 cm/0 to 12 inches. Whether you need to draw lines or measure angles, it is versatile enough to meet all your woodworking requirements, saving you time and effort. 4、ALUMINUM ALLOY, STAINLESS STEEL MATERIAL: The ruler is made of sturdy and durable aluminum alloy and stainless steel material, which can withstand heavy use and lasts for a long time, ensuring its reliability and longevity in your woodworking projects. 5、EASY CARRYING: Comes with a compact size and being light in weight make the semicircular ruler easy to carry for convenient use.