The upgraded double use model includes a option for enhances stability, while the none version ensures none interferences with electronic devices, making it multifunctional and user friendly Perfect for new homes construction, renovations projects, replacement, or any scenario requiring meticulously floor leveling For professional builders, DIYer enthusiasts, and homeowners who need to lay floor tiles with precise and ease Constructed from durability aluminum alloy and abs, this contouring ruler features a double side high precise scale for accurate positioning Achieve perfectly levels floor tiles with the equal height ruler, a specializing tool designing for precise height measurement and alignment, ensuring flawlessly installation everytimes, Manufacturer: SHANGYAKEJI