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Add power and flexibility to your key ring, without adding bulk. The MSTR Key is a beautifully crafted stainless steel multitool that’s the same size as a common house key but packs the punch of 20 practical tools to help you out in a pinch. A flat screwdriver, box cutter, pill cutter, bike spoke wrench, and wire stripper are just some of the handy fixes the MSTR Key provides.