The back door had security locks controlled from the front.

They're all under some kind of security lock and key.

"Getting past the security locks he's put in place will also take some time."

He pushed the security lock on his key ring and opened the trunk.

High security key locks are used in a few vault doors.

There was a perfunctory security lock on the building's main door.

He was turning the key in the security lock when the phone rang.

Also the security lock and key will keep your valuable collection protected.

Then she raised her eyes to the security lock.

Still talking, she walked over to release the security lock.