Is there a limit to how many doors a skelleton key can open?

April 4, 2007 7:49am CST
I started thinking about skelleton keys today as my work keys are in a different city and I keep having the use the skelleton key to get in and out. It got me thinking about how they work exactly, there must be a limit to how many doors they can open, surely the key would start getting to complicated? Does anyone know how they work? What do you reckon?
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