Professional Quality. Easy installation, good looks, and sturdy construction. Appealing to the do-it-yourselfer, the remodeler and light commercial contractor. Unique offset ends rest on main tees. Plug-in positive lock insertion (DX) system simplifies installation of all components. Quick Release feature on the DONN DX clip means one can easily remove and reuse cross tees without special tools and without damaging the tees. White.