How to Decode a Control Key for Small Format Core (SFIC)

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Demonstration that shows how to decode the key cut for a Control Key for a small format core ie. Marshall Best, Best, Falcon, Arrow. This applies to an A2 master key system. This method is used when you are unable to retrieve the codes or the control key has been lost.

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If you just pinned up the core and can't get the lug to retract, set the core on its side with the lug facing up. Get a small file and give it a hammer whack while the control key is in the core. The lug should retract, and if it doesn't, you have the wrong pins. Use the ejector pin to check the depth of each barrel. The one that is a different one should be ejected and repinned.

changclifton

Not directly related though a passing mention of how to replace the cap on the top of the barrel would have been in order.

shadroid

How do you get that icore out to do this, with out the control key?

faradaymaxwell

Thanks. Super simple explanation. You should make a series of videos where you decode a lock for operator, control, and master and how it's done.

kevenquinlan

I understand but why is 13 the magic number

dennischausse

How would you decode the control key for an A4 system? What number would you subtract from to get the key cut?

markklossner

What is the subtraction number for an A4 system?

Brandon-kqj

This only works if the cylinder was properly combinated to exact A2 specification. If someone chose top pin by "good enough to work" standards then measuring the top pin won't work.

killer