Missing the key cylinder. The Schlage S51PD 626 Satin Chrome Door Handle Lock is a high-quality commercial door hardware designed for use on 1-3/8″ to 2″ thick doors. Featuring a sleek silver satin finish and a keyed entry design, this door handle offers both style and security for your business or building. Made by the trusted brand Schlage in the United States, this model is suitable for commercial use and provides a durable and reliable solution for your door hardware needs.