Accurate Measurement Miter saw protractor has minimal errors with a great degree of accuracy for miter cuts/single cuts,easy to read precision engraved scales.the precise setting for your miter saw that This setting is sliding and easy to operateUnique Design Beautiful and easy to read,smooth and accurate operation The O-ring design allows the saw protractor goniometer to rotate 360 degrees, any angle measurementensuring reading inside/outside angles smoothly and accuratelyEasy to Use and Carry The miter saw angle finder is suitable for outdoor use,with light weight and compact size,the angle finder has adjustable and foldable design, so it is easy to carry and storeEasy to Read The high precision miter saw protractor is designed with an engraved dial and eliminating unnecessary calculations, easy to read angles and quickly read the desired informationWide Application Whether you are a professional or not,simple operation method and easy to use,the angle measurement tool is suitable for carpenter,building trades,plumber,inside outside corner