Information about locks themselves. Questions, tips and lock diagram information should be posted here.
by ViralYouth » 12 Oct 2007 11:38
Ok I have a theory of how to get a key stuck in a lock in such a way that you can't get it out well at least not easily. Say if someone were to cut a key with steep valleys but on the downslope of the valley they cut it at a 90 degree angle. When you insert it the pins or wafers glide right over the upslope but after they reach the peak of the slope they drop straight down so after the key is inserted the pins and are not able to be removed easily. In this case how would you remove the key? Would it require destructive entry?
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by dougfarre » 12 Oct 2007 12:13
TRICK KEYS! I love it! I give it two thumbs up.
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by JackNco » 12 Oct 2007 12:22
this doesn't sound like destructive entry, just plain old destructive.
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by maintenanceguy » 12 Oct 2007 12:24
I've done this.
I've got an irrigation timer that irrigates several athletic fields at night. If I leave the timer box unlocked, it gets tampered with by every athletic coach that wants more or less water on their fields (screw everybody else's fields).
If I leave it locked and it malfunctions or if there's a night game, everyone will get wet so the athletic dept. needs access to the timer. As mentioned before, If I give them a key, the timer will be constantly messed with.
So I cut a key exactly like you mentioned so they can use it in an emergency but can't use it without me knowing about it because I'll find the key stuck in the lock.
-Ryan Maintenanceguy
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by vrocco » 12 Oct 2007 12:31
Can I ask, how do you get it out then when they call you?
Thanks!
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by maintenanceguy » 12 Oct 2007 12:39
since my edit buttons not working I'll add that it does not require destructive entry, just sliding a pick in alongside the key to lift the pins.
-Ryan Maintenanceguy
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by ObiWonShinobi » 12 Oct 2007 12:40
First timers making bump-keys have done this on accident.
The key can be snapped off (to see the keyway),
(No one said anything about not destroying keys, just locks)
and a needle or a Broken Key Extractor can be used.
(Ive even used a paperclip with a SMALL bend in the tip)
Success depends on HOW DEEP the pins reach into the key.
cutting HIGH_LOW_HIGH_LOW at 90 degrees would,
prevent ALMOST anything from getting it back out.
Maybe bumping might release it?
The airhammers we used in aircraft mechanics had a nice
SLAP to them.
Something THAT HARD would only have to move a fraction of a millimeter
to bounce the pins up HIGH. That is... if there is ANY ramp left.
Hitting it too hard would be destructive.
No Im not worried about people using this idea for B&E.
The air compressor on your truck would be too loud.
Not to mention the airhammer itself.
A TINY drill might tear up the key enough to remove it bit-by-bit.
(Can we talk about drilling KEYS????)
But still, seems too destructive overall to me.
Doing this will definatly get your @$$ kicked by the lock's owner.
By the way, me AND my neighbors have MULTIPLE cameras,
ALL OF THEM monitored off site. And I'm sure many other people do
nowadays as well. DONT DO ANYTHING STUPID.

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by ViralYouth » 12 Oct 2007 12:42
vrocco wrote:Can I ask, how do you get it out then when they call you?
Thanks!
That's exactly what I'm asking. I guess I worded it wrong earlier. I was asking if it would require destructive entry to remove the key
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by dougfarre » 12 Oct 2007 12:48
maintenanceguy wrote:since my edit buttons not working I'll add that it does not require destructive entry, just sliding a pick in alongside the key to lift the pins.
On most higher security locks, however, this method would surely render useless due to the fact that there would be no room to slide a pick along side the key..
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by ObiWonShinobi » 12 Oct 2007 13:23
Thats why you snap off the key, you can then see the pins.
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by zeke79 » 12 Oct 2007 14:39
Peterson sidewinder shim extractor. That would work in alot of cases to remove these keys easily.
For the best book out there on high security locks and their operation, take a look at amazon.com for High-Security Mechanical Locks An Encyclopedic Reference. Written by our very own site member Greyman! A true 5 Star read!!
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by maintenanceguy » 12 Oct 2007 14:51
dougfarre wrote:maintenanceguy wrote:since my edit buttons not working I'll add that it does not require destructive entry, just sliding a pick in alongside the key to lift the pins.
On most higher security locks, however, this method would surely render useless due to the fact that there would be no room to slide a pick along side the key..
I only filed down the outermost cut so the only pin I had to raise was the one closest to me. But you're right, there are some keyways where raising this pin would be difficult but I'm sure I could come up with something thin enough to fit.
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by nzleagle » 12 Oct 2007 15:40
We make a key called a securiturn, instead of having a normal key head its got a plastic head simular to a thumb turn, so if someone has a double cylinder deadbolt, they can use the securiturn while they are home, and when they go on holiday, they insert a special tool, to remove it, and you got extra security to stop people from taking things out the door if someone broke in.
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by ObiWonShinobi » 12 Oct 2007 17:12
You use on the inside? or outside?
I have seen some people say that you can insert something
into the inner lock and it prevents people from bumping or picking
(using a key???) on the outer lock..... is this similar?
All my double padlocks are independant of each other.....
So would not work here, but still curious.
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