Ultion develops and manufactures locks, keys and handles for better door security. Below, Dutton explains how to choose the right smart lock, and tips to keep in mind during installation.

The company has hundreds of parts to choose from. You can even submit the dimensions and a picture of your door and its handle through the website. A representative will point you to the right part.

The door handle rod can be installed before or after the lock mechanism is replaced; the cylinder rod will have to wait until the mechanism is reinstalled. Here's another view of what the rods ...