Nut-and-bolt combination lock - GIF

Nut-and-bolt combination lock.

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Previously:

Custom multi-point locking door - GIF
How a combination lock works - GIF
How a lockpick gun picks a lock - GIF
Inmate demonstrating how to break padlock - GIF
Seatbelt buckle gate lock - GIF
Unique gate lock - GIF
Unlocking locks with a lockpick gun - GIF
Visible combination lock model - GIF

So - 6*6*6 = 216 combinations - you can pick that lock by trying all the combinations in under 5 minutes and with a little knowledge, under 20 seconds...

Biggest thing it has going for it is nobody expects 3 nuts with numbers...

Pull the lever and rotate each bolt until there is no drag.

Quote:

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Originally Posted by rgsparber

Pull the lever and rotate each bolt until there is no drag.

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The same trick applies to most combination locks such as bicycle and key safes even as a young lad I could open those in a minute.

I thought about a way to make a safe or lockbox with a solenoid operated lock. 10 SPST push button switches in series with a battery and proper solenoid. Three or four n/o switches and the rest n/c. All n/o switches would have to be made and none of the n/c switches. All the switches of course would need to look identical. If any one of the n/c switches was made it would open the circuit and the solenoid would not be energized.