Suggest you get a new key cut, The Keys ware especially if there is 2 ton of assorted house keys swinging of it as well. If you allow the key to ware to far you will have 2 problems, 1. unable to use it as pattern as it is too worn, 2. I may jam in the barrel. both are not ideal situations. The key is softer of the 2 material wise and is designed to the waring part, easier to get a key cut than replacing a barrell
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