The keyboxes whilst offering a convenient ease of access have very poor security, and need to be out of sight for casual passers by. Difficult for a corridor accessed flat!
I believe that many of the 4 digit wheel boxes will accept any combination sequence of the 4 digit number. Since the most frequently chosen code is year of birth, it reduces the security even further by 2 orders of magnitude. I suspect that under the 5th pebble in 4th flower pot from the left is probably more secure!
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