Medeco M3 and other single-sided deadbolts

Sep 28, 2007 Last reply: 18 years ago 3 Replies
D

I'm trying to choose a good high-security lock. Double-sided deadbolts worry me because I don't want to get locked in my house in a fire. So I'm looking for a good single-sided deadbolt.



Mark Tobias claims that Medeco M3 single-sided deadbolts can be opened with what's described as a slightly modified screwdriver and a metal shim, and that several other manufacturers' single-sided deadbolts can be opened in the same way. My guess is that a little doohickey attached to the end of the screwdriver blade is used to turn the cam on the end of the lazy tailpiece. Are there any single-sided deadbolts that are not vulnerable to this method of attack?


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D

I still hope somebody can answer my question. If you don't know what I'm talking about, you can read this:

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It's not bumping of the Medeco M3 that I'm worried about. What I'm worried about is the "even simpler technique using the wire shim and screwdriver" that the article describes.

Or read this:

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(scroll down to "MEDECO DEADBOLT DESIGN: What Next?").

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S

If you are really worried about it pay a few bucks more for the Medeco Thumbturn/Key retaining deadbolt. It's a true double cylinder lock but a special key/thumbturn is used on the inside. It can only be removed after operating the outside cylinder. Once removed the lock functions as a double cylinder until the inside thumbturn/key is reinserted. It's the best features of a single and a double cylinder deadbolt combined.

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U

Tobias didn't mention the drilling they did. Buy a single cylinder Maxum manufactured after Sep. 07.

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