How to Buy the Right Allen Wrench Set (Because You Need One)
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If you’ve assembled IKEA furniture, you’ve used an Allen wrench. These slim, L-shaped contraptions are often the only tool included in the packaging, even when you’ll need others to finish the job. There’s a good reason for this: Most people don’t own Allen wrenches, and when you need one, nothing else will do.
from Lifehacker
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