The Mysterious Combination Lock

A lighthearted explanation of how a typical drop-lever combination lock works

[milesjackson]

Informative AND entertaining! Kudos to S&G and Mr. Costley for an outstanding production!

[brianhignett]

I'm a retired safe tech. and this is an informative and entertaining explanation of how a mechanical combination lock works - he even mentions us Aussies! Well done Brian.

[FlyToChina]

Nice video with a sense of humor. Not sure if I ever gonna need the informtions, but still worth watching for 7 minutes or so

Cheers from Denmark - Adam

[scrappycat]

I've often wondered HOW my safe lock works. Thanks for an excellent but very informative explanation !

[derekbroestler]

AWESOME video... been trying to explain safe locks to both friends and customers alike... USUALLY they just tune out (then again, I've never tried the "this is a thumb, but that's not important right now" approach)

[paulbadoni]

One of best informative videos I have had the pleasure of viewing !

[Zodliness]

The fastest lock manipulator in the world is Jeff Sitar, who can open combination locks in about five minutes, but in reality, he's unique and few can match his speed and talent. Digital combination locks however have become the norm nowadays, they're typically defeated/bypassed using know vulnerabilities. The era of mechanical combination lock manipulation is quickly disappearing, as the modern market demands digital locks, which inherently rely on re-lock mechanisms to protect these vulnerable locks. Thanks for sharing.

[lillyf]

My Sargent and Greenleaf combination lock has to be turned right to zero after the last number, held stationary while a small knob in the center is turned 45 degrees to the right, and the complete dial is then turned to the right until the lock is released. It takes two hands to operate it successfully.

[tlou]

This kind of lock was a mystery for me since i was a child. Thanks to your fine explanation i now understand how that works :-). Thank you very much .

[redneckzen]

Excellent! Thanks so much for this. I have a stuck lever that requires dialing to the number 8 and banging on the door. I really need to get that replaced, don't ya think? Thanks again. I now understand why my lock is giving me fits!

[Lisi_Mxo]

This is a thumb, but its not important right now...

[d]

Enjoyed the narration style, congrats.

[sivalley]

Narrator sounds like he took style notes from The Stanley Parable.

[dickiedildo]

Excellent video with great production values

[ourochroma]

I like this narrator
It makes me feel compelled to entering the door on my left

[haimm]

I am a safe technician in Israel.
This video is very proffesional. Great job!!!

[HansMilling]

Awesome, I am going to make a 3D model for 3D printing. I always wondered how a combination lock works, and now I know, so now I want to build my own as a proof of concept to show others.

[HifiCentret]

I'd very much like to see a cut away group 2M lock in action! Somehow all the videos here on youtube only show the regular Group 2 lock. Curious about the extra security against manipulation looks in action.
Perhaps also a Group 1 would be nice.

[elton]

this is so nicely explained, i always wondered how it works. THANK YOU :D

[doctorbobdc]

That was Great, narrating.
Who is this gifted, entertaining speaker?
I would watch Anything narrated by him.