The Yale® standard duty knobs from the New Traditions series offer outstanding strength, durability and simple, elegant designs highlighted by natural curves for comfort and ease of turning. The Cirrus, Horizon, Terra, and Valley knobs are built to the highest quality standards. All New Traditions products are built on a steel Grade 3 chassis and feature concealed holding screws. In addition, all New Traditions products feature “Quick-Install,” a unique chassis design, which drastically reduces installation time. The New Traditions series offers all of these superb features at an incredible value.