This multi-angle measuring ruler is made of high-quality aluminum alloy, it will not break due to bending or rusting, it is more durable and stronger than plastic.2. Precise angle measurement tool: This angle measurement tool is laser etched with markings (inches and centimeters), which is very suitable for precise angle measurement. You can resize to accurately mark tiles. A metal protractor is an ideal tool for measuring and integrating hole positioning.3. Time saving: Use the sliding ruler to quickly measure the angle and size, lock it, then stick the ruler on the material that needs to be cut, quickly draw the size and cut, save your time and improve your work and productivity.4. Improved angle measuring ruler: Our multi-angle measuring ruler is newly upgraded with rich functions. It is a measuring tool and tile positioning hole saws