Durable ABS MaterialThe protractor is made of high quality ABS material, which is sturdy and durable, resistant to friction and has a long service life. In addition, the disc and the centimeter scale are equipped with a level, which makes it easy to grasp the scale. When the blisters are in the center, it means horizontal balance. Two Scale RulersThe protractor is designed to help you easily measure the correct and accurate bevel angle. It has two different scales in inches and centimeters, which can provide the precise angle (internal or external) you need for the perfect cut. It is very convenient. Accurate measurement and readingThe protractor O-ring can ensure smooth and precise operation, get accurate internal and external angle readings, and avoid incorrect measurements during the process of bevelling. In addition, the protractor supports any angle measurement from 0-360, which can provide you with the exact angle you need. Easy to useThe protractor has a dial engraved and two easy-to-read scales, easy to use and carry, and feature a unique one-handed clamping mechanism. Simply set your saw to the angle you read on the protractor. Wide range of applicationsProtractor The bevel error is extremely small and the accuracy is high.Its measuring arm can rotate freely without any dead angle. It is ideal for carpenters, plumbers, households and all construction industries that need to measure and transfer angles.