let's focus here

minute 3.12

defeating this requires...a magnetic trick...

http://www.bsasi.com/potter-hsc-1

BSASI.COM

Potter HSC-1 High Security Bank Safe and Vault Contact

The Model HSC is a High Security Contact Switch to monitor the open or closed position of safe and vault doors. The switch includes design features, which…

"hello world" welcome back to war, thursday, 08.30 am! So...what the world doens't know..is the story of this switch...the reed switch...there are 3 fantastic stories, of 2 robberings and one espionage case...for "convenient" resons never told...what does this switch disables on a very sophiscated security lock?..we are talking about a encoding of 5 turns on the wheel, with 3 decimals code each turn..

https://www.explainthatstuff.com/howreedswitcheswork.html
https://www.explainthatstuff.com/howreedswitcheswork.html

EXPLAINTHATSTUFF.COM

How reed switches work (magnetically operated switches)

An easy-to-understand explanation of how reed switches are triggered by magnets and a look at some typical uses.