for mount no drill security screw is hidden on the back of the anti-theft case, which is a real anti-theft. It cannot be removed from the side of your door unless the door is open. The newly designed holder front opening does No-block the doorbell's motion detection sensor. for mount no drill white,The size of the doorbell that can be placed inside is not more than 2.55inches Wide x 5.11inches High x 1.14inches depth. Anti-Theft Video Doorbell Mount compatible with Ring Battery Doorbell Plus (2023 Release) and (1-4 generation)and (2nd Generation - 2020 Release) and Blink Video Doorbell. (Video Doorbell Not Included ) The door must be swing inward! Not suitable for storm doorand iron security door!The door thickness must be within 0.59-2.36 inch and door Space over 0.06 inch.Please be sure to measure your door before buying. Place your video doorbell into the anti theft mount shell of the doorbell mount bracket and fix it with sponge pads, attach the metal doorbell mount holder with screws to the shell, then adjust the doorbell mount fixed clip to install the ready video doorbell mount to your home/apartment/office/rental door. No drilling is required and Easy setup. Made of premium metal and hard ABS shell, enough to prevent your expensive video doorbell from stealing. Widely compatible for house, rental,apartment,dorm,offices, business building. If you have any problems, Please us immediately.We offer the best service to every customer., Weight: 0.83555197298 Pounds, Manufacturer: Malloy