The Tolsen 55164 is a tubular knob privacy lock designed for interior doors, making it a practical choice for securing bedrooms or bathrooms. It is crafted from a durable aluminum alloy with a brass cylinder, finished in an antique brass tone that adds a classic touch to your home decor. The knob itself has a diameter of 51 mm and sits on a 65 mm rose, while the wear-resistant multi-layer coating helps the finish stay intact over time. This lock is compatible with doors between 35 and 45 mm thick and features an adjustable backset of 60 to 70 mm to ensure a proper fit in various frames. Its simple rotation mechanism allows for effortless opening, providing a reliable and straightforward experience for anyone using these private spaces.