The B-3 Necessikey is a perfect little dynamo that provides all of the essentials, right when youll need them. The B-3: A blade, a bulb, and a bottle opener, right on your keys! Unlike some of the small LED bulbs on the market, Mantis designed the B-3 to allow for replacement batteries. Just one of the many great benefits that MANTIS brings to the industry. The slip joint blade is 1" long, and the whole unit is just a little bit larger than a quarter.
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