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With this simple wrench you can tighten or loosen a faucet aerator without damaging the nickel plating. You just have to fit the aerator into the hole and turn, in this way it will be tight or, on the contrary, you can loosen it to clean or replace it.
It will take you to print it max 5 minutes and you will be sure that you do not dent the aerator
Use only the designer´s profiles, they have been painstakingly retouched to exact tolerances for a perfect fit.