When tested with an XRF instrument, this typical American house door key
had the following reading: 12,800 ppm Lead
How much Lead is "too much" Lead?
The current amount of Lead that is considered toxic (and illegal) in an item "intended for use by children" is anything over 90 ppm Lead in the ...
Read More about Typical American house key: 12,800 ppm Lead. 90 ppm is unsafe. Don’t let kids (especially babies) play with real keys!