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Most door hardware products are design to fit standard door preparation as illustrated on the left. If you have something different, please start with our hardware replacement guide at the link below.
How Double Keyed Communicating Function Works: - Keyed cylinder on both sides. Each side functions independently from the other. So if one side is unlocked with a key, the other side remains locked.
Advantage Commercial Knobset
Applications - For offices, schools, hospitals, apartments, hotels, motels and other public buildings.
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