This ceiling grid has an extra narrow interlocking section of grid to fix between Main Tee sections. The DX (current grid standard) design enables the profiles to be cut quicker and easier thus saving time and energy and benefitting the installer. The Donn DX has a weight reduction of around 20% from previous Donn grids. The well-known DONN® Quick Release Clips (QRC) are located on the ends of Rondo DONN® Cross Tees to enable fast and easy installations without the need for mechanical tools or fixing. A few square edge tiles are suitable but limited.