[Door Compatibility] The doorbell bracket is only suitable for inner-opening doors. Please note carefully that outer-opening doors, iron anti-theft doors, storm doors, screen doors, and glass doors are not compatible. The door thickness must be within 0.59-2.36 inches, and the door gap must be above 0.06 inches. Before purchasing, please be sure to measure your door. [Applicable Doorbell Models] For the No-Drill White Ring Doorbell Bracket, the size of the doorbell that can be placed inside does not exceed 2.55 inches wide x 5.11 inches high x 1.14 inches deep. (Video Doorbell is not included). [No Drilling Required] Place your video doorbell into the anti-theft Ring Doorbell Mounting Housing of the Doorbell Mounting Bracket and secure it with a sponge pad, fix the metal doorbell mounting bracket to the housing with screws, and then adjust the doorbell mounting fixing clip to mount the ready-made video doorbell to your home/apartment/office/rental door. No drilling required, easy to set up. .[Anti-Theft Video Doorbell Bracket] For Ring Doorbell installation, the anti-theft housing has hidden no-drill security screws on the back, which is a real anti-theft device. It cannot be removed from the side of the door unless the door is opened. The well-designed front opening of the Ring Doorbell Bracket will not block the motion detection sensor of the doorbell. .[High-quality Material] Made of high-quality metal and hard ABS housing, it is durable enough to prevent your expensive video doorbell from being stolen. Widely suitable for houses, rental houses, apartments, dormitories, offices, commercial buildings.