Premium Material: Made of sturdy aluminum alloy after oxidation treatment, this set of saddle layout rulers is durable, resistant to distortion, practical, anti-rust and corrosion resistant. Surface: Laser engraved metric scales and corner angles on each sides of miter T rulers are clear and precise, making it convenient and easy to read value or make marks while using. Slide to Mark: There is no need to reverse the body when measuring, just slide to mark the right and left 45/90 degree angle. High Accurate: The square protractor helps you draws perfect horizontal lines while sliding the rule along the edge of your work. Measurement, correction, marking in one. Application: Thicken ruler design, make ruler stable and accurate, perfect for DIY, engineer, carpentry, woodworking and home use. 45 / 90 Degree Aluminum Alloy Woodworking Square Protractor Miter Triangle Ruler Layout Measuring Tool for Engineer Carpenter Feature: 1. Multi-purpose for one tool, precise measurement, marking. 2. Made of aluminum alloy, durable and comfortable hand use. 3. Thicken ruler design, make ruler stable and accurate. 4. Perfect for DIY, engineer, carpentry, woodworking and home use. 5. Accurate scale and simple operation. 6. Measurement, correction, marking in one. Specification: Material: Aluminum alloy Installed size (length * height * width): 112 * 85 * 79mm Measurement accuracy: 0.1mm Angle: 45/90 degrees Color: Blue, Red Note: 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! Please allow slightly measuring deviation due to manual measurement.