The folks at Copper Creek have worked tirelessly to make peace of mind security both convenient and easy to use. As you find with a standard deadbolt, the DBZF3410PS electronic deadbolt can be locked or unlocked from the inside using a manual turn piece, and from the outside you have the option of unlocking using the programed code, or manual key. Each deadbolt will allow for up to 6 individual programmable passcodes and the keypad illuminates when dark for ease of use at night. Made of durable zinc material, this electronic deadbolt offers quality that will hold up over years of use. Who says that great security cant have great looks too? The polished stainless finish is warm and inviting and adds a touch of class to any door it is installed on. Add convenience to your home security and find out why Copper Creek is Designed For Life.