Permanently Disable a Household Lock with Lock-Kill - ITS Tactical

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Permanently Disable a Household Lock with Lock-Kill

By Bryan Black

Lock Kill

If you’re a property owner or landlord and ever have the need to permanently disable the locks on your rental property quickly, look no further than Lock-Kill.

The folks at DG3 Locksmithing have come up with an ingenious way to modify a key blank to ensure you can quickly restrict access to a household lock without needing to call out a locksmith to rekey. Provided you still have a way into the dwelling that is.

By taking Schlage and Kwikset key blanks and cutting a 90 and 45 degree angle into them, DG3 has effectively created a way to bind the Lock-Kill key in the cylinder. As it’s inserted the 90 degree wall allows each pin to drop into the valley and the 45 degree cut allows that same pin to pull back out until the Lock-Kill key is inserted completely. To further complicate matters, the head of the key has a groove etched into it that makes it easy to snap it off, simply leaving the broken key in the lock with nothing to grip to remove.

Lock Kill

Lock Kill

I’ve had these Lock-Kill keys for some time now but wanted to thoroughly test them to see if there was any way to remove it before I wrote up an article on them. Picking didn’t work, bumping the lock didn’t work and neither did a broken key extractor. I couldn’t get a pick into the keyway with the Lock-Kill key still in there and with the head of the key broken off, there’s nothing to tap when bumping. The key extractor didn’t work because that pin was still locking the blank in.

Lock Kill

Lock Kill

You could take some needle-nose pliers, grip the broken-off key and tap the cylinder or pliers in an attempt to bump the pins, but I couldn’t get it to work. The only way to gain entry again would be to either have another way in, which hopefully you do if you’re the landlord and you’re using Lock-Kill, or to drill the lock. In the video below I show how gaining access to the pins will allow you to remove Lock-Kill, so if you’re skilled enough to be comfortable removing pins and you have access to take the lock apart, there is a way to remove the device.

Lock-Kill is definitely a sure fire way to ruin someone’s day if doors are the only means of entry and this review certainly isn’t meant to highlight that. If you have a true need to quickly disable a lock for legal reasons, Lock-Kill will do the job well. If you ever encounter Lock-Kill being used for unintended purposes, my hope is that this review will at least give you a heads up on what you’re dealing with.

Lock-Kill keys can be purchased directly from  in Schlage and Kwikset blanks. They’re also currently on sale for 1/2 off with free shipping at the time of this write-up.

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  • Samuel H. Digan

    Neat idea and they do look cool. However at $10 each, I think you could create your own for much less. You could easily use blanks from any hardware store and a file or hacksaw to make one. Alternatively, use power tools to create a bunch!

  • Brandon Franklin

    At almost 10 bucks a key, it seems like it would behoove most people to just file their own from a blank. Not sure I like this more than other method for disabling a lock or sealing a door shut.

  • Sadly it’s probably not a good legal use to give the local drug dealers the hint that you don’t want them living next door.

    I’m with others, making your own might make a little more sense, but kudos to the people making them, great idea, enough for me to buy to support the idea.

    • John

      Or if your a landlord make sure you have a spare key for the places you rent out

  • mary ivanovic

    I’m a property manager that has had the opportunity to use this and they work great! Sometimes I have to lock someone out late at night and this makes it quick and safer for me so I can get to it the next day when it’s a little safer.

    Great product.

  • I am a avid ITS viewer and weekend warrior and would love to buy this just because I have nothing better to do with my money. Not only is it pointless but it comes in red with a gay tag attached to it. Can not wait to see their next amazing invention that has absolutely no purpose.

  • Darren T

    also you can cut a 90deg the same way but with out cutting the deep v and the cut the key lenth in half . then you stop them from using there key and you can insert your half back in to take the key half back out , sory I am using cell.

  • Isaac

    As a locksmith for 20 years this is nothing new. We commonly use broken keys to lockout secondary doors during lockouts when the store alarm is going off and you only have time to rekey the front door. We take a pre-cut key and snip the blade off and stick it in the keyway. Out of the probably hundred times I have done this I have only maybe 5 times had trouble getting the key back out with key extraction tools. This one
    Might be a little difficult but with the right tools it can be removed. This will work with any cut key you don’t have to spend $10. One last thing, this key isn’t even brass it’s Aluminum which makes it even cheaper!

  • John

    I’ve made something similar when I was locksmithing. Similar idea but the way I did it you could remove the insert without disassembling the lock. I only used a part of the blank to make inserts that had a hook on the back(I had a pre-made one and would just duplicate it on the manual duplicator). The “removal tool” was another blank that was modified with a hook that goes down. When inserted the removal tool would hook the smaller insert and in the process of hooking it push the pins up and allow the insert to be removed. Who the hell want’s to remove and disassemble and re-pin a lock in a crappy renthouse with pissed off people around!

  • Jim Bo

    You can save some money and just buy a small tube of super glue. Put a few drops in the key hole and they wont get a key in, even with a hammer.

  • john reed

    I think this is really cool. I have no idea when I’d need one, but it would be a good companion to my lockpick set, just to have. You never know. Thanks for the vid!

    Oh one other reason to pay $10-if it has a tag attached and is professionally done, it’s for landlord-tenant purposes. If you have keys that are filed or cut, in my opinion, cops are more likely to think they’re burglary tools somehow. I’ve had my BOB in my trunk searched for weapons before ,and thank god I didn’t have any lockpicks (even though perfectly legal of course) or anything to give them the idea I was up to no good.

    You can beat the rap, but you can’t beat the ride. I’ve seen them haul people in for less, just for spite.

    JMHO. Thanks for the vids!

    • What reason would they have to search your vehicle?

  • Jake

    Interesting product. Of course this wouldn’t work with the locks in my apartment building.

    We have this skeleton key-type lock made by CISA that has a bunch of circles instead of the traditional grooves.

  • Crashonhead

    A few drops of super glue holding a needle inserted inside the bottom of the keyway is a sure fire way to disable the lock cheaply yet still be recoverable. You can still pick the lock and once open, you’re able to pull the cylinder; a quick soak in solvent and the pin comes right out.

  • Ken

    As a cop, I’ve gone to plenty of tenant/landlord disputes where the landlord is trying to improperly remove the tenant. If the eviction is not done according to law then the tenant still has the right to occupy–by any reasonable means necessary. That includes breaking a window or kicking the door to gain entry. The damage becomes a civil issue.

    This is a pretty cool gadget, but I can see a landlord getting into more trouble than it’s worth with this device. I guess it depends on the state in which one lives.

    It’s trivial to make these and you don’t need a blank–a cut key that fits will work.

  • Bobby

    Somehow I feel some people will use lock-kill as a prank.

  • legalbeagle

    An alternative that I like is the Kwikset rekeyable deadbolts. Be your own locksmith.

    • Those are very insecure and shouldn’t be used at all. We’ve got an article coming up on those.

  • orry

    ok since these are aluminum , that opens a critical weakness , all you would need to remove it from the lock is a syringe full of either mercury or gallium . just poke and prod at it for a min or two when the lokkill is dissolved just pick as normal

  • iabweb

    lock out a tenant- and see what the judge does to you–you wont do it a second time..  especially if you are a person of means- which you are as a landlord- you will get sued.

  • Locksmith

    As a locksmith I can tell you this is stupid and useless, I can still get in with this toy in the cylinder! Don’t waste your money.

    • KeyserSoze54

      @Locksmith Its an advertisement.  Did you really want the truth?

    • David Walker

      It’s not designed to keep out locksmiths, just tenants and non-professionals. Your comment is prideful.

  • KeyserSoze54

    @John What the hell are you rambling about?

  • Jimmy Rogers

    I assume you insert the key and break off the end of the key. So what is the tag for? the person breaking the key off has the tag.

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