SturdyLock® Jimmy-Proof Deadbolt Rim Lock and Adapter for August Wi-Fi / Pro
IMPORTANT NOTE 3 of 5: If you have an existing jimmy-proof deadbolt lock, you can retrofit your existing key cylinder into the new jimmy-proof deadbolt, but whenever you use your key you will need to lock again before taking out the key once you are inside and manually unlock with the knob of the August to get the App back in sync because the key cylinder and the thumb turn work independently on the deadbolt.