Quality material: the miter saw protractor is made of durable engineered plastic material and features a wide range of features; This herringbone saw protractor has accurate calibration and high precision High precision: the shape O ring ensures smooth and accurate operation; The measuring arm rotates freely and can be applied in a variety of angle measurement, creating a nice decoration for the crown shape and bottom shape Wide purpose: this engineered miter saw protractor can be applied in a variety of industries, such as, carpentry, carpentry, plumber and cons truction industry and others which need to measure and change Size information: the multi function miter saw protractor is about 32 x 10 x 8 cm; With light weight and compact size, it is easy to carry and store Easy to read: the high precision miter saw protractor is designed with an engraved dial and two easy to read scales, making reading speed fast and not so complicated to use Features: Practical measurement tools: This miter saw ruler is a practical measurement tool for many occasions, and can be applied to kinds of industries, like carpentry, carpentry, plumber and construction industry and so on. Easy to use: The miter saw protractor is designed with an engraved dial and two easy to read scales, making reading speed fast and not so complicated to use. With high measurement accuracy, it brings much convenience to your work. Specification: Material: plastic Color: as the pictures shown Size: 32 x 10 x 8 cm Package includes: 1 x Miter saw angle ruler Note: Please allow slight errors on size due to manual measurement.