A 90-degree swivel mount is useful when a doorbell or security camera must face a direction other than the one provided by the standard surface. This occurs around narrow door coverings, side walls, built-ins, and corners where the standard bracket points the camera away from the main wall. A swivel mount changes the viewing direction so the device captures a more useful area around the entrance. It is especially helpful when you install the doorbell vertically on the front door or when limited space restricts camera placement. Check the unit model, bracket compatibility, available settings, and surrounding wall space before selecting a 90-degree swivel Doorbell Mount. DoorbellMount offers mounting options for various Doorbell models and sophisticated entryway layouts. The right swivel mount improves visitor visibility, reduces blind spots, and creates a convenient camera position.

Where to Use Swivel Mounts: Maximizing Flexibility

Wherer to Use Swivel Mount 90degrees.  The Covered featured image has a large cover plate on some stucco.  It was c custom plate a customer wanted to cover up some old holes.

https://www.doorbellmount.com/collections/90-degree

Locations on where to use the adjustable swivel mount with a few reviews and location example photos.   Perfect applications.   This is where you want to use the 90 degree swivel Mount.   

But you can also use it on Narrow Trim.   This trim was about 1.5 inches wide.   The base on the the swivel mount is 1.8inches.  So there was a little overhang on the side but it did not affect the installation and still worked fine there.  He could have used the narrow base, but it was not required.

Here is another one on bricks.   You can also customize the hole spacing if you are mounting on bricks so you dont have redrill your holes.