New Master M532XKADLH picked

[Lauren]

So, here is the new Master re-keyable padlock that is re-keyed without having to take the lock apart, similar to the "Smartkey" concept. The lock can be re-keyed to any 5 pin KW1 household key. The cylinder uses a side bar system and rear locking bolt as the primary locking concept. The entire lock can be taken apart once the lock is open with a screwdriver. This cylinder has no pins. Instead, it has disc wafers. The lock can not be picked in the conventional manner. The tip of a key or similar tool must be applied in the rear of the cylinder to disengage the locking bolt. This means that the proper key must be inserted disengaging the rear locking bolt while properly displacing the side bar. Also,there is no shear line or pin set feel to hold the wafers in place under tension with the use of a conventional tension wrench.

After taking the lock apart, I discovered that pin set could be accomplished if the side bar could be placed under pressure. All of the wafers clicked in nicely with the side bar. But, this still left the dilemma of disengage the rear locking bolt while pin set was maintained. I used the tip of a tension wrench to displace the bolt and also as a means to rotate the cylinder.

Well, it is one thing to pick the cylinder with the lock apart, but it's an entirely different issue with the padlock intact. I found the flaw in the lock design and discovered a way to tension the side bar. The padlock design has two problems. One, it has too much play between the cylinder and inside lock body. Second, the half round hole on side of the cylinder intended for the insertion of the key change tool is in perfect alignment with the side bar, and it gives access inside the lock. By using the wide amount of space between the cylinder and lock body, I made a sickle shaped tool from a Peterson tension wrench. The sickle puts spring pressure against the inner lock body, and the depth of the tool must be properly maintained to make perfect contact with the center of the side bar. While applying continuous side tension with the modified tension wrench, I was able to pick the wafers in position. Next, I immediately inserted the tip of another tension wrench in the rear of the cylinder to disengage the bolt and to turn the cylinder. The second tension wrench must be reinserted to rotate the cylinder back to closed position.

[femurat]

Well done. Putting pressure on the sidebar looks easier thanks to the strange hole on the plug face...

Cheers

[fgarci03]

Nice!

I really like these new ways to pick a lock
Congrats Lauren, you made my day!

[GWiens2001]

Kudos, Lauren. Are there any rekeyable (without disassembly) locks of which you are aware that are not ridiculously easy to open or bypass? The Winfield Hotel lock seems interesting. Have one in my collection, but have not taken the time to make keys for it yet.

Gordon

[Lauren]

Well, this master lock is really not rediculously easy to pick (as in pin setting), unless you want to do some random wafer scrubbing, which has no professional basis what so ever. I am not familar with your hotel lock and I tend to discuss locks that offer technique and clever solutions to the locksmith. I am always looking for new project locks both new and old.

[spandexwarrior]

Excellent work Lauren! I looked at mine for several days and couldn't figure it out and set it aside.

Any chance you can post some pics of the working end of the tension tool you use to tension the sidebar?

I took mine apart and can easily pick it with the plug in place but the cover plate off - I just can't seem to get the bend in the tool right to be able to get it into the right spot fully assembled. Maybe a thin music wire tool that could be inserted to a specific depth and then turned would work - something with a small loop at the end. I'll see what I can do.

-Brian

[Squelchtone]

That's a very intersting padlock. I wonder if that hole is similar to a U-Change or Smartkey or SecureKey design. Does it seem to have real key pins?

Thank you for sharing and congrats on the nice pick job!
Squelchtone

[MacGnG1]

HomeDepot.com has these: http://www.homedepot.com/p/Master-Lock-Magnum-2-in-Rekeyable-Solid-Body-Padlock-with-2-in-Shackle-M532XKADLHCCSEN/202663609

haven't been able to find them anywhere else.

[KPick]

Nice lock. I have seen those locks before, other than that. Great post. Thanks

[spandexwarrior]

Here are some additional pics of the internals.



Inside the green circle is the center of the sidebar, where you need to apply inward pressure to tension the sidebar and set the wafers.

The red circle is the spring loaded bolt that you need to disengage through the keyway before the plug can turn.







-Brian

[jeffmoss26]

Thanks for the breakdown. Wonder if other cylinders would fit in there.

[GWiens2001]

Just picked up four of these from a local Home Depot. Thanks for the link above - without the SKU, they had no idea what I was talking about. They kept trying to hand me an M530 (four pins, no security pins, rekeyable by disassembling) because the lock body and shackle look the same.

Just a note - Home Depot is discontinuing this lock. That is why I got four of them - three for trade.

Gordon

[DrPrizza]

Hello! I know I'm late to the party, but just started playing with this lock! I found a simpler way to defeat this thing... Use a top of the keyway tension wrench and then use a rake (or even a paperclip...) and just depress the very back of the cylinder with it. The lock should open! It ridiculous how simple this thing was to defeat... Wiggle it around a bit and just keep trying to press straight back towards the shackle. if you dont get it right away!

[spandexwarrior]

Hello! I know I'm late to the party, but just started playing with this lock! I found a simpler way to defeat this thing... Use a top of the keyway tension wrench and then use a rake (or even a paperclip...) and just depress the very back of the cylinder with it. The lock should open! It ridiculous how simple this thing was to defeat... Wiggle it around a bit and just keep trying to press straight back towards the shackle. if you dont get it right away!

Are you sure about that? The back of the keyway is closed so there's no way to access the actuator for a typical bypass and the mechanisms that unlock the sidebar aren't accessible by going strait back either.

-Brian