Alarm Lock Systems Inc. DL4100 US26D Trilogy Electronic Digital Lock Std Ko 26D, Satin Chrome

Works great and fairly simple to instal. Have used it in a commercial setting for a couple weeks with over 50 different codes input and on exterior door without issue

We use the DL4100 locksets on our public restrooms. They are programable to open/lock at predetermined times which alleviates the need for a staff member to physically drive to each location each day to unlock/lock. They have worked great for us and have proved as a deterrent for our homeless population to use the restrooms as a means of permanent housing.