They came to a door, opened it with a heavy key, entered.
He locked the door and slipped the heavy key under his belt.
The guard fitted a heavy key in the door and slid it open a few inches.
There was the turning of a heavy key and Larsen emerged.
Benn't opened it with a heavy key that hung from his belt.
It was six inches long and the heaviest key I'd ever hefted.
And reached for a heavy key and turned the lock.
Then the rattle of the heavy keys in the two locks.
The guard nodded, lifted a heavy key from the wall and headed for the barred door.
Nadia smiled and left the big, heavy key on the wooden table.