Lightweight aluminum alloy: The square ruler has good anti-rust properties and is durable. It is made of lightweight and rust-proof aluminum alloy, which has a long service life. Accuracy assured: The carpentry ruler guarantees the accuracy of measurement and rejects measurement errors. Its scientific precision makes the work more efficient. Multi-angle measurement: The woodworking square does not need to change your location all the time for the measurement work, because it has multiple azimuth angles for easy measurement. Easy to Use: The carpenters square has no one-size-fits-all method of use, which makes your drawing work smoother, just clamp it around the board to measure. Wide range of applications: the carpenters square carpenter has a wide range of applications, such as woodworking, decorative design, industrial design, metal processing and other places. Note: The data are all manual measurements , please allow 1 - 3cm error, due to the difference in light and display, there will be some color difference, depending on the physical object received.