On 08/02/2019 10:00, Chris Green wrote:

I've actually come the conclusion that an 'ordinary' mechanical button
operated lock this like this will work fine:-

https://www.screwfix.com/p/codelocks...ton-lock/4103t


NOT applicable for your application but those type of locks can be very
insecure as well.

They may have 4 digit combination but often it doesn't matter in which
order you press the 4 number buttons. Unless the code is changed
regularly or the buttons are regularly cleaned it can become obvious
which 4 buttons are being used.


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