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Old 03-27-2002, 02:48 PM
pjtib pjtib is offline
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Join Date: Feb 2002
Location: Clearwater, FL
Posts: 46
Logic, not physics, would lead me to believe that the "hole" gets smaller as the metal expands.

I equate it to the blow up life preservers they sell for children. You slide the preserver deflated over the childs arm and then blow it up - expanding the device making the inner diameter smaller, therefore securing it onto the child.


I used them on 3 of my kids and no one drowned... guess they work.
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