Robust and Durable: It is made of high quality stainless steel, has super anti-rust and anti-corrosion performance, and can withstand high pressure for a long time. Laser engraving marks make the numbers embedded in the material, so it will never wear or fade. Multi-angle measurement: Place wooden blocks parallel at a degree angle, then place them in a T-shaped square to align the bricks. The folding ruler can be moved to multiple angles to realize the measurement of multi-shape objects. It has metric and imperial dual scales, and can be changed to dual scales. Compact Design: The multi-angle tool ruler can be folded and easily disassembled to meet different measurement requirements. It can be easily put into a storage bag and taken out of space, easy to use and carry. Easy to Use: Place the ruler on the work area, adjust the angle, you can push the four-sided ruler mechanism and lock it at any angle you want, tighten the knob, you can start measuring, drawing and others tasks.Wide Range Of Applications: It can be used for special angles/shapes in civil engineering, masonry, floors, roofs, tiles, etc. Patterns used to create tile, wood, glass, etc. can also be used by engineers to draw and measure. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending on the physical object received.