Comes with a TOSTEM key cylinder and 3 spare keys. These are the keys that were attached to the house I moved into. There were no issues with opening or closing, but I replaced them with new ones for security reasons, so they are no longer needed. As these are keys, I will ship them anonymously via Rakuraku Mercari便, so your address will not be known to me. Please feel secure in your purchase. Regarding compatible doors, the original door was: Thickness: 4 cm Door name: Maderard Door markings: Top symbol: QDD-835 Middle symbol: QDC-18 Bottom symbol: QDD-19 This is the key cylinder that was attached to this door.