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You never know when a knife may come in handy, either for cutting open a stubborn package or getting yourself out of a dangerous situation. But carrying a sharp knife around in your purse or backpack isn’t very convenient. Enter the Credit Card Survival Knife. You can get a two-pack for just $16.99.

This knife looks like a credit card when it’s folded up, and will fit neatly into any of the credit card slots in your wallet. But just because it’s smaller doesn’t mean it’s less durable. This knife is made out of tough stainless steel and will resist rust and scratches.

Slip one of these into your wallet for when you need it most. The Credit Card Survival Knife is now just $16.99 — and you get two for the price of one.