Reliable quality: The measuring device and the ruler body of the woodworking side ruler are made of stainless steel, which has anti-corrosion and anti-rust functions and can be used for a long time. Accuracy: The ruler tool can be adjusted from 0 to 70, and there is a steel ball every 5 (plus 22-1/2, 67-1/2), which can firmly lock the angle drawing line during measurement ;Any angle can be obtained by moving and rotating the ruler. Available in three sizes: This product is available in 4 sizes of 10", 12", 15" and 20" to ensure your various needs in use. Simple operation: This ruler makes layout a breeze, fast and accurate. Turn the ruler to get your desired angle. Adjust the nut for the best feel. Wide range of uses: Ideal for students, mechanics, carpentry, vehicle maintenance and repair, construction, drafting. Can be used in workshop, home improvement, toolbox, cabinet.