(1066) Construction Lock Silliness
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- čas přidán 27. 08. 2024
- (1066) Construction Lock Silliness
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this kind of lock is very prevalent in China，it's called AB卡巴，you always get these in new apartment doors which installed by contractor.We usually change it when decoration done,it's just a cheap convenient temporary solution for handyman.I think this kind of lock cost less then 5 dollars in China.
Isn't everything less than 5 dollars in China?
@@lisjeislief Interestingly, Chinese factories are the most flexible factories in the world. You can order cheap, won't be good. Or you can order good, won't be cheap.
But because lots of people want things as cheap as possible, most resellers importer clamped on "cheap".
@@PanduPoluan it's just a meme by this point. The idea that the chinese only produce crap, is because american businesses order crap, to keep their costs down. China is 100 percent capable of manufacturing high quality goods, as is any post-industrial society. This lock is a great example of it, even bill took a lot of time trying to pick this lock, and as the OP says, it's less than 5 dollars.
@@ExarchGaming Exactly. That was what I was implying, actually.
Basically, with Chinese factories, you get what you're willing to pay for.
I'm sure the lock factory can produce something much more secure, but at significantly higher cost. And that's kinda pointless if, as Xia66 started, it is used only temporarily for decorating/renovation. Use the cheap one, when job is done, throw it away and replace with a much more secure one.
These locks exist in sweden too, but for a entirely different purpose: You buy this lock, and then you use the "construction key". If you lose the "construction key", you use the "standard key" set. However, there exist no notched key in the swedish set, rather, mere using the "standard key", will disable "construction key". This works by having ball bearings like in this lock, but with pockets that are slightly smaller than the driver pin size, but larger than the ball bearing, in the cylinder wall. These locks also exist with multiple rekeys, so you could have "1" key, "2" key and "3" key, using "2" key will disable "1" key, using "3" key will disable "2" & "1" key.
Nice way to disable a lock fast while retaining access. But I wonder why there is a need? We don't have these in Denmark..
Why in the hell do these cool locks not exist (prevalently) in the US?
@@reeepingk as a locksmith, construction keying is very prevalent in the usa
Think this was one of the first video's I found, and also ordered the lock, there were real tiny balls in one cylinder that drop out with the singe reset key.
Thanks to Bill and others I got started picking, repairing, rekeying... locks of all sorts.
Hope your doing well Bill and family
The red dust is likely gyptol, a sort of lacquer. It hardens into a crystal like material and when moved, it shatters into dust. It could be that the ball is glued to the last pin and comes loose when the notched key is used.
bill if you watch this slow at 7:57 when you put the construction key in you can see a tiny puff of dust come out
Holy shit, you definitely can see a puff of smoke or whatever. Great eye.
Holly curd how did you even catch that
This is what Google Translate says the Chinese text says:
A, B, C lock is a new type of lock, which is mainly designed to master the theme of security 1, A, C key with plastic packaging (with a gap for the C key). A, C key In addition to the owner, the other person can not open the seal to the owner of the security guarantee, A key in the insurance function can be used before and after the failure of 2, B key to the installer to use. 3, the installation is complete, the owner after acceptance, as long as the C key into the lock cylinder rotation 360 degrees. B key that is automatically invalid, A, C key can often use 4, the owner should not try to use the C key before opening. JY 6C C is the person's taste. twenty three
Ugh, Google Translate is kinda horrible for non-western languages. DeepL Translator is much better. The problem is to transcribe the Chinese writing into characters, though 😆
Yeah, the whole time, I'm shaking my head *no* at the hunch that this is some kind of Indiana Jones red dust/sand trap lock. Great video, as usual, BB!! Thank you for your patience and teaching!
Really cool, love these types of deep dives into commercial lock technology
gotta love the persistence
Brilliant video Bill, I really enjoyed the journey and investigation :-)
Love your vids bill. You go in depth and show us how you figure something out. Wish to see you again soon
So glad you did the follow-up, because if you think about it, your first "adhesive dust" theory could not work: if the last pin was stuck it could never come out :)
with the 7th cut on the construction key being lower than on the master, could you bump it with the construction key?
Your red mars dust theory was funny. Great analysis.
16.47 the ball bearing is in the lower left corner of the top cutout in the pinning tray
Very cool. I was kind of hoping it was a change you could make back and forth, turn it 360 to the right, and the construction key is disabled, turn 360 to the right and it enabled it, so basically you could turn the keys on and off as you needed them. Would there be a way to do something like this?
Thanks for doing the follow up work on this, Bill!
Ingenious lock! And, excellent forensics, Bill. Thanks for the lesson in persistence
Cool little lock bill
Who dislikes Bosnian Bill's videos? Lock companies?!?
Oh gotcha. Scammers who fake lock picking to get views
Matt Thomas lol well... MasterLock shareholders anyway..
Probably just people that stumble onto these videos by accident and don't want youtube to recommend a bunch of lock smithing videos
Or those who are scared because "Criminals pick locks", which is complete and utter bullshit.
People with fat fingers on mobile
You've made me very grateful. Very grateful that my friends that routinely lock themselves out don't know about that lock. I'd be swearing in Zulu by the time I got through that lock.
I just did this exact thing and I've seen this video previously! I'm about to pick it: ) my 1st dimple
Yeah bought some as cheap replacement locks, small ball bearing on both sides, lost the first one though, heard it bounce bounce bounce on the tiled floor. They are not easy to pick, but easy to drill!
Nice, never know this locks exist.
The barbarian falls into the skeleton, thats the purpose of it. If u think, the barbarian has a floor under it, once you pull it has to end up falling unless you try to remove the key very fast, hence the resistance you faced.
Those are Awesome how they come up with the idea of the little ball bearing, I can see if driving you crazy..
I recently had to drill out an ABUS 83 Schlage core because a T pin I made slipped into the smaller chamber adjacent to the 4th pin chamber in. Completely ceased and no other option other than to drill. I'm planning on filling in the drilled holes with some brass stock and solder it into place and continue to use the cylinder as a challenge lock.
I had a similar problem, fortunately my cylinder had a removable top. All my other cores with the extra holes I filled with J-B Weld epoxy. Seems to work pretty well.
Or you could tap out the holes, and find a threaded plug that will fit. Saves you re-drilling if you get a little too ambitious with your pinning again. Also would make swapping out pins and springs a breeze I'd imagine. Just a thought. Happy picking.
I was planning on doing this myself, but I unfortunately drilled into the chamber off center. I drilled into two of the chambers. The first wasn't too bad, but the second was really offset. I'm thinking maybe I can mill out the entire top with my Dremel and files (I don't have access to a milling machine). Then I can get some .5" diameter brass stock and cut out a section with two tapered ends to fit into the core. I can then go through the bottom of the core and drill into the bar stock and tap those holes. It seems like a lot of unnecessary work, but I like to make the most use out of things I have. It would be possible too to just make it so the brass stock insert would slide out keeping all the springs and pins in place, so I could skip the drill and tap steps.
I created a brass pin insert to fit into the core. It fits perfectly in the C6A 300 Schlage core, but the newer versions are the C6A 3000 which have anti drill pins inserted into the core and the bible. The small hole next to the fourth hole in on the core is also slightly smaller in the 3000 core. I'll be posting a video showing the differences between them and hopefully a successful pick and gut this time around. LOL.
This is actually the same lock we have for one of the backdoors (to the balcony) of one of our office locations in Beijing. The practice of a construction lock is very common... but it does not mean they do not change the lock afterwards, but usually in the handover period after renovation, or before renters move in, this is common practice.
Ah, i see... @Xia66 also mentioned it
I think this is very clever design.
yea i been watching bills vids for a bet he knows his stuff cant wait to start picking thanks for the reply
I think you could also hear the bearing drop down at 16:04
Glisern
I heard something
What a fascinating lock! Thanks for sharing Bill!
In Europe we have another system. The key cylinder is still he same, contractors have a key can just open 1st door lock, this key can't operate to fully secure the door. The keys for the owner are inside a sealed package, divided in 3 parts. Every parts o f the package there is a different set of keys. First set has green dot, then yellow and last is red. In case one of green dot key is lost, you can use the yellow key. Using the yellow key, green key will disabled. Same happen in case you lost also yellow key. Last is red key, using it the yellow key is disabled.
Thanks, I bought a new door fitted with one of these locks. They called it a landlords lock meaning if your Tennant didn't pay the rent you could lock them out. I messed up and used the master key so I can't use the Red keys.
a very clever lock now it takes me 15 minutes for one but improving
can it be re-set by turning it upside down and turning the key 360 again?
Most Euro-profile cylinders that I've seen have the cam set at an angle when locked, whereas that one appears to be flush. It would be relying solely on the central screw to hold the cylinder in the door. What's more, when the door is open, the lock could be removed without using the key.
Maybe the red powder stuff is Redstone. Damn, I've been playing too much Minecraft...
Listen what happens when the notched key is turned, at 16:00.
One can hear that the ball bearing is pushed into the keyway when the key is verical.
I think this level of construction locks is intresting. though because the owner key doesnt immediately kick the builders out, but you need the change key.
You are funny , Bill .
So. It's only during initial construction, not a handyman key. And it only needs to work from the outside. Don't want them locking themselves in, owners out.
So if you fill that last notch in the construction key with blue tack or something, you get an owner's key? Doesn't really sound that secure.
Not that easy. It has to be the exact right thickness and all plus the pins are magnetic.
very nice vid bill in my neck of the woods we call them profile locks my first call was to rekey a premises and it had 6 of those locks F'me took a while (hours) in fact on how to rekey them. not easy but if i had to deal with that ball bearing i won have went nuts very nice vid thankx
I like your theory. My theory is that [dinosaurs] "are thin at one end, much MUCH thicker in the middle, and then thin again at the far end. That is the theory that I have and which is mine, and what it is too!"
Its like one of those Chinese puzzles, very cleverly done ;-)
Looks exactly like a kwikset PK construction key ball bearing.
...so to prove out the theory, one would repeatedly enable & disable the construction key and the red crap should disappear after a number of cycles, and when that happens, the construction key should never work again.
EDIT: Wait. Is the construction key thing a one-time deal? And it can never be used again after it's been disabled once?
I had a lock almost exactly like this. There was a ball bearing that was so tiny, maybe 0.060" By luck I found it. When I tried pulling the plug the top pins fell into the skeleton but I managed to cut the springs while pulling the plug out. Of course everything was pretty chewed up. I think the inside lock has one less pin so there was no bearing and the construction key still worked the inside lock. We all learn lessons the hard way. Bump keys sure mangle these cheep locks. Nice video. Thanks.
I'm thinking there was a small extra piece on that driver pin that get sheared off when it falls into the notch on the special key. so the extra part would be in the Bible not on the key pins
its neat but completely over thought. you rock bill
Maybe but it is very clever! The tiny ball bearing stays inside.
DJW1959Aus definitely clever. i dont kno why but it makes me think of best locks with the control key.
Really? Best locks? OK.
ive seen construction leyed kwikset locks
6:06 ahahaha giggity
That's a super cool lock
My understanding is that a large percentage of locks made in China for domestic use have a construction key.
A way to make It unpick able is to allow an open if the key rotate 180 degrees.
Awesome video Bill!!! That was fun!
Bill, have you tried to insert the the change key and get the ball to drop back into the hole by inverting the cylinder from normal that allowed was the ball to drop? Maybe it stays in the chamber? Couldn't possibly just disappear, there has to be a chamber it falls into or out of. Even into the locking dog possibly...
Maybe you could glue a ball bearing in the dimple of the 7th pin on the construction key to make it work like the owners' key?
very interesting lock, great video Bill
I definitely would gently grind chamber 7 in order to see what's in it before doing anything else.
couldn't the ball bearing be reloaded into the notch key and returned so the red key would work again?(not searching to see if someone asked already)
Hey that might work.
You would need a way to push it out of the key notch back up into the pin cyl against the spring.
And you need a way to not drop it into the cut out chambers
Chinese puzzle... Solved! Excellent video. I believed the red dust theory was possible, but the bb makes sense. Meanwhile a lowly Masterlock 140 is kicking my butt. 😂
How often do you break picks or tension in a lock? I'm not a lockpick but in video games they seem to break all the time, is that a real concern?
APP - no, it is just game design. Reality is not that fragile ;)
In a previous video he mentioned he used to break a lot when starting out and still breaks them from time to time. He has bags of spares in thge lab ready to go.
Seems like the bitting is so similar that it shouldn't be difficult to convert one of the construction keys to a owner key.
That last pin is magnetic.
I suspect that the ball can be of a brittle material that pulverizes when you use the master key.
That´s a pretty clever Idea. oO
The red dust may have been oxidation. The locks did not appear to be lubricated well? And the pins are most likely a ferrous metal due to the high magnetic property of them. The ball bearing seems like a wafer type of pin for multikey pinning assemblies. The ball goes in between the last pin assembly? It is removed and replaced by the skeleton by of the control key to indicate whether the contractor key is functioning?
It uses the bible hole of the sixth pin as the pass off point via the "skeleton" relief in the control key as you spin the core a full turn?
why is that key (and obviously keyhole as well) so wide? if there wouldnt the the right part where there are no pins the tension wouldnt be as simple as this
Given how easy euro cylinders are to change, even for the end user, I don't really get the construction key setup - just change out a cheapish lock for a good one at the end of construction. And retain the cheap one to use for the next time you've got to do construction.
So couldn't you add a small bit to the end of the red key to turn it into the black key? Seems like it should be easy to make the red keys work again
Light, Light, Light, and light again, Bill knows this already, but, I guess it's difficult to setup ... , camera does not focus properly when, part of the background has more light, in this case, the reflection on the keys , than the foreground , those steady fingers :))
And BTW, +1 like, video out of ordinary :)
Funny lock...
Ingenious !
Wonder if the red key can disable and enable a guest key?
first thing I would think of if I seen red dust would be magnets, they attract iron dust. pin might work off of magnetism.
16.45 I'm screaming at the screen! Bill the ball bearing is on the pinning tray!!!!!
15.20 its on the tray already
IT"S RIGHT THERE!!!!!
Just took one of these apart the hard way, but there are two ball bearings , in each lock for the construction key. Pictures on request
You know what I'd do instead? Cheap normal locks while the construction is still taking place. Then replace them when the work is done.
thats what most builders do. have a cheap set of kwikset/defender locksets that have the same key for the entire development and can be beat to hell. then swap out for whatever the customer specs.
tin2001 I feel these locks are most likely to be used if you will have contractors entering a occupied space. Like a valet key for you car in a way not construction.
its not for that, its like if you need something fixed in your house that youre living in now, or for someone whos house sitting. literally made so you dont have to do all that extra work.
My understanding is they are for when the house is initially under construction (not for repairs or house-sitting, etc). During construction many different contractors need access to the house so they will all need a key. With so many different companies and people with access, it means a lot of people have access to be able to copy or keep a key after construction. However, once the house is complete they shouldn't need access anymore, so that is when the lockout key is used. You could achieve the same result by changing the locks or re-pinning after construction is complete, but this lock is designed to negate the need to hire a locksmith or deal with the locks yourself again once construction is complete. Designed to be convenient way to "change the locks".
+Michelle Hetfield no, these are for while the house is being built, once you change the lock to residents key there is no going back to the construction key for workers
As a home buyer though.... Isn't the first thing you do replace the outside door lock?
You don't know who installed the lock, and who has "borrowed" the keys.
strange but true well done sherLOCK
Hang on, is this a one time only set special lock? Do you use every night to keep the workmen out or is it you only use once at the end of the job and you can't undo the change?
The small ball bearing is designed to explode when you open the lock leaving behind the red dust, no...really!
Very cool
last pin has three pins for two shear lines? The notch made by the notched key crushes the pin/ shear used by the red key?
Great video! I'm a little confused though, does that mean once the change key has been used the red keys will never work again?
Yes, you're correct.
Correct, they are used during construction and this makes it so during construction the doors can still be locked. After construction is finished the locks can be changed so the contractor can't get in. All without having a locksmith comeout and have to change every lock.
yes that what it means. Its that the construction workers cant copy the key. Its complete bullshit tho cause if they know the system they can just copy the key and just don't drill hole no7
Yep, once you use the change key, the red "construction" key will no longer work.
Yes, the intention is to protect against tradesmen stealing/losing/copying the keys during construction of the house and those keys later being used to commit crimes against the homeowner after the house is finished.
Another great video
Seems pretty obvious what happens. The little ball falls in the gap between pin 6 and 7 (you call it skeletton?). You should be able to get it out if you insert the key with the notch into the lock with the key facing down and the bible facing left. Keep the key facing horizontally and rotate the lock until the bible faces down, until it is aligned with the key. Turn the bible back again and very carefully pull the key out. Gravity should keep the little ball at the bottom, enabling you to get it out.
would like to get my hands on one of those euro cylanders to mess around with.
YOU ARE A LOCK GOD BILL!
at least it had nice springs.
Hi Bill, I was wondering why do the manufacturers make fake pins? its not like everybody are going to cut and open the locks to see inside ? love your vids ciao
This is an odd thing to find sold like this. Usually construction keying is used for a large facility with lots of builders who have to come and go as they need and have free reign until the facility is finished. Construction Master keying lets you have the locks and other security set up and working to keep the riff-raff out while the place is set up, then you don't have to be too sure you got every last key back from the builders when it's done, and the master keying doesn't get in their way. You can do it so all the cuts are different, though, not just one. With this, a lost construction master is still a risk, since there's now only one difference to account for. And while sophisticated attacks like that aren't at all common against most locks, the kind of facility that is Construction Master Keyed is often the kind that just might be the target of sophisticated attacks.
This is the lock equivalent of those Chinesium electronic power factor correctors: selling worthless quantities of something only interesting to corporate entities to the general public who probably don't know what it's really good for anyway.
This is the first 8 pin lock I've seen. What's the most number of pins youxve seen Bill? Are there locks with more than 8 pins?
I got a slider type of euro like these. but the construction key has the cut out section and the owners key is solid. and after using the owner key the con key is void like the construction keys we have here in the states. there is no chang key needed. But mine being a slider lock it has me confused. I suppose I will have to gut it to find out.
the ball bearing falls into the false chamber
so you can use the red keys once or can you change the lock as much as you wish
Would you be able to use the construction key with a small blob of solder or something added?
There is still one guessing tho', Bill...
Where in the heck does that minuscule ball bearing go after it fell into the "changer" key cutout?
Please let me know what camera you're using. I ask every video and never get s response
Sorry, first time I've seen your comment. This is a common question so I put it on the website FAQs. See FAQ #7 here: lock-lab.com/faq/
bosnianbill thank you very much!
General HowTo sends Bill an email through his site... He gets thousands of responses on his videos there's no way he reads them all... Besides having a job he also does this for us as a hobby.
Whoops just noticed you replied Bill lol
Kevin Cormier Ok thank you. Wasn't aware