That all makes sense. I couldn't find the barbed nails that i was thinking of, barbed like fish hooks (thanks hacksaw). I did find all those pics of barbed nails that bigdaddytx's search came back with. I just didn't think that they were 'true' barbed nails...

Thanks all,
Kris
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"One should not increase, beyond what is necessary, the number of entities required to explain anything"
William of Ockham (1285-1349)