The Screwpop Utility Knife is a box cutter style knife that can easily attach to your keychain. It features a simple design constructed from solid stainless steel with a yellow brass eyelet. An easy to find two or four notch blade fits into the channel and is locked in place with a fold down clasp. This tool can even be used as a bottle opener. The Screwpop Utility Knife is priced at $6.95 and is available now from screwpoptool.com
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Definitely not TSA-friendly!
Well, it could be – just remove the blade before flying and pick a new one up at your destination.