High quality hardware value: specially designed for all kinds of copper doors, glass doors, KFC doors, our sensor is the perfect choice for all kinds of residential doors. Our sensors are safe. In addition, our sensors ensure that the doors work properly and parts are always replaced. Easy installation: Each of our sensors comes with detailed installation instructions, including every suitable part, saving you time and facilitating quick installation without delay in use. Our automatic door sensor does not need to go to the hardware store to run, simple operation, fast hand! Note:our sensor is suitable for copper glass KFC door, please choose the sensor suitable for you according to your needs..syi