He followed up six flights of stairs past doors with double locks and no sounds from inside.

It has a double lock that can be easily opened (by adults) with one hand.

The vault has a double lock and can only be opened if two keys are used.

The double lock on the front door was too high for the child.

This one had not only a double lock but a high bolt.

So, she huddled in her apartment with its double locks and security system.

The feeling passed as we walked past an open hatch with a double lock, and I wanted to smile.

No tool is required to double lock this type of cuff.

In practice, it does no such thing for there is a double lock on Article K9.

'We hope for some sort of strengthened glass and double locks,' he said.