Stuck in the woods in need of fire? There’s a great big ball of it a few million miles away, and the Solar Spark Lighter and Survival Tool will let you harness some of it to get a flame going. It’s a stainless steel parabolic mirror with a vertical holder placed right at the focal point. Wedge a piece of wood, or some other tinder and point it at the sun and in no time you’ll have the beginnings of a fire; that spot can reach hundreds of degrees despite the tool’s small size. Measuring 4.5 inches across, it’s relatively portable and definitely on the “must-pack” list of any self-respecting outdoors enthusiast.
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Radio Shack sold this as a cigarette lighter for years back when I was a kid.