" wrote in message
who uses these, anyway?
http://www.amazon.com/gp/product/B00...4?ie=UTF8&s=hi


Plenty of people in certain industries

From the description:
a.. Non-Sparking, Non-Magnetic, Corrosion-Resistant
a.. Meets OSHA and NFPA Requirements For Use in Hazardous, Flammable or
Combustible Environments

Sounds perfect for oil rigs, oil refineries, chemical plants., etc.