Mags are great lights. Look what emergency personal carry and you'll find a Mag light 9 out of 10 times. I've been a firefighter/paramedic for 25+ yrs and I've never had one fail. Be sure to get the right(Mag)light bulbs as the most common bulbs you'll find are only rated for only 4Cell and will have a short life. As for protection they Work very well- or so I've heard.

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2dieseljohn
1979 300sd (283,000+) Road Trips
1983 240D 4-speed (350,000+) Daily Driver
1967 E-TypeS1 in bits and pieces