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Mul-T-Lock: Design & Security v2



Familiar Face

Posts: 95

Joined: Fri May 28, 2010 5:25 pm

Location: Los Angeles

Post Fri Oct 12, 2012 5:04 pm

Mul-T-Lock: Design & Security v2

Hello everyone,

A massively updated version of "Mul-T-Lock: Design and Security" is available on LockpickingForensics.com. From the site:

This paper discusses Mul-T-Lock telescoping pin-tumbler designs throughout the company's nearly 40 year history. This includes the Classic, Interactive, CLIQ, 3-in-1, MT5, and MT5+. In addition, attack techniques against Mul-T-Lock systems are evaluated. There are several appendices that include keying and coding information for Mul-T-Lock locks, as well as a patent reference for (almost) all Mul-T-Lock models and components.

You can grab it from the articles page, or via the direct pdf link.

I can (attempt to) answer any questions you might have here or via some other form of contact (contact details are available in the paper or on the website).



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Active Member

Posts: 593

Joined: Thu Jan 12, 2012 12:33 am

Location: California, US

Post Fri Nov 30, 2012 1:25 pm

Re: Mul-T-Lock: Design & Security v2

That article is the best i've read. It's really amazing and in great depth! I really want a mul-t-lock now to pick and try those techniques on :drool: ! Great website too!


Familiar Face

Posts: 66

Joined: Sat Jun 30, 2012 6:04 am

Location: Dallas, TX

Post Sat Dec 29, 2012 6:19 am

Re: Mul-T-Lock: Design & Security v2

My sentiments exactly, this is by far the most thorough write up i've found about Mul-t locks. This answered all the questions I had. Thank you! :smile:


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OldddffAASSTT the Spin Master Extraordinaire and American Lock Slayer
OldddffAASSTT the Spin Master Extraordinaire and American Lock Slayer

Posts: 4412

Joined: Thu Mar 31, 2011 3:16 pm

Location: Michigan

Post Sat Dec 29, 2012 1:01 pm

Re: Mul-T-Lock: Design & Security v2

I've yet to try my hand with Mul-T-Locks. Undoubtedly, this info will come in handy.
Thanks for the heads up on this dg... and as always, your work is greatly appreciated!
" Enjoy the journey AS MUCH as the destination."


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Posts: 183

Joined: Tue May 08, 2012 9:53 am

Location: Germany

Post Sat Dec 29, 2012 3:58 pm

Re: Mul-T-Lock: Design & Security v2

Solid work on those articles without a doubt!
Congratulations and thanks for sharing :)


Familiar Face

Posts: 27

Joined: Sun May 02, 2010 9:40 pm

Location: Pennsylvania

Post Sun Dec 30, 2012 3:36 am

Re: Mul-T-Lock: Design & Security v2

Thanks for all your hard work researching Mul-T-Locks. That article is incredible and definitely a labor of love for the hobby.

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