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 Achieve perfectly levels floor tiles with the equal height ruler , a specializing tool designing for precise height measurement and alignment , ensuring flawlessly installation everytimes Constructed from durability aluminum alloy and abs , this contouring ruler features a double side high precise scale for accurate positioning 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, Manufacturer: TSMORY