KABA is really uncommon for residential units in the US. But you probably could optically measure the key, since the dimple's diameter shows the depth. It's al

KABA is really uncommon for residential units in the US. But you probably could optically measure the key, since the dimple's diameter shows the depth. It's always seemed like a safety hazard to me with interior-locking doors. When I stayed with a friend in Paris, I was locked inside their flat when they left early for work.