I have heard that a few times and I would say that 1084 possible combinations on the pushbutton mechanical locks are just not that many when you have kids (teens maybe?) that don't respect your things. Where there is a will there's a way, right?
While I don't usually like a backup key because it does give another access point, I have looked at offering a dual purpose key option that might enhance security enough for some people to offset having that additional access point available.
With the key in one position, it is essentially a deadbolt. When you enter the correct combination the pushbutton lock still won't open. The knob simply rotates through the built in clutch without being able to retract the bolt. Useful if you keep an HD gun in there all the time. Just engage the deadbolt when you leave the house in the morning and disengage (neutral position) when you get home or go to bed.
In neutral, there is no function of the key lock. In the third position, it opens the door as backup key.
DeadboltBackupSmall.jpg
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