"Application: Ideal for engineers and carpenters and more. Suitable for wood, stone and metal processing measurement, Material: The protractor square ruler is made of stainless steel, which is rustproof and durable. Adjustable: With adjustable square head for accurate measurement. 0~300mm measuring range and adjustable angle. High-precision:High-precision manufacturing, double-sided ruler, mm and cm scale, easy to read, suitable for measurement, marking, layout and more." Material:Stainless Steel + Aluminum Alloy Measuring Range:0 - 300mm Accuracy:1mm DIY Supplies:Woodworking Measuring range: 0-180 degrees. Features: - the body is high stainless steel materials, which is not rusted and not deformed. in the area of microprocessing, the technique of laser technology is used for high precision manufacturing. - Mobile multi azimuth measurement. - Big blister design. - Suitable for measuring, marking out, Woodworking, laying out etc. Note: 1. Be sure to tighten the bolts, the fixed blade before use. 2. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 3. Please allow 1-3mm measuring deviation due to manual measurement. Package include 1 x Combination Square Ruler