USG Ceilings panels work together with the DONN brand SDX/SDXL Ceiling Suspension System to form the fastest-installing ceiling systems in the industry. The DONN brand SDX/SDXL Ceiling Suspension System is the most widely used acoustical suspension system because it offers maximum economy simplicity and accessibility. With a body made of hot-dipped galvanized steel the SDX/SDXL system provides corrosion resistance and ensures paint adhesion. The commercial remodeler and the do-it-yourselfer will find ceiling installation easy with the patented quick-release cross tee clip and will also find a square sturdy ceiling with the USG main tee splice. The most widely used acoustical suspension system offers maximum economy simplicity and accessibility. It can be used for both general and fire-rated applications.