using a multi-regulatory card rule, you can do 5 different things! From measuring 45 degree, 90 degree, depth, width to drawing line. measuring tools are definitely multifunctional. You can insert a straight ruler, it works like a rigid cardon. The aluminum alloy T-ruler is a built-in locking device, making the measurement and marking more accurate, the vernier caliper is easy to read and move for horizontal, vertical, long, short, parallel and right angle lines Meet various operations. Bring you a new and different feeling of use. This T-ruler is made of high quality aluminum alloy materials with good corrosion and oxidation resistance, anti-rust, stable quality and long service life. 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.