When I saw that this thing fits over my existing deadbolt two things came to mind and in this order:
1. Wow, that device must have a lot of torque as many deadbolts, mine for example, actually requires some effort to turn, either to lock or unlock. This resistance is caused mainly by the springiness of the weather stripping which pushes back against the door when it is closed.
2. Sometimes, when sunlight falls upon—and heats—the door I need to push or pull slightly on the door in order to turn the deadbolt at all. The door is not dimensionally stable and deadbolt alignment changes. This makes me think that the system would not be reliable. I know my door and deadbolt are not unique in this regard.
1. Wow, that device must have a lot of torque as many deadbolts, mine for example, actually requires some effort to turn, either to lock or unlock. This resistance is caused mainly by the springiness of the weather stripping which pushes back against the door when it is closed.
2. Sometimes, when sunlight falls upon—and heats—the door I need to push or pull slightly on the door in order to turn the deadbolt at all. The door is not dimensionally stable and deadbolt alignment changes. This makes me think that the system would not be reliable. I know my door and deadbolt are not unique in this regard.