The 925 Crystal knob is a timeless favorite for homeowners. Once used for a vintage style, it can now be seen in all design trends from traditional to modern. The prismic details in the crystal refract the light for a clean crisp look. The smooth cuts provide a comfort grip when handling the knob. With the highest residential ANSI Grade 2 Security rating and made of environmentally friendly components, this crystal knob will upgrade your home to luxury. A Single Dummy knob is for a one door application. Easy to install and used on diy projects, new construction and remodel.