this post was submitted on 06 Sep 2023
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If you are from Europe, especially German-speaking countries: So called Buntbartschlüssel (literal translation: colorful beard keys) are very popular for older buildings and garden sheds as well as for interior doors in residential buildings.
There are around 70 different types with you being able to spot which one is need by just looking inside the keyhole, there are handy charts for this purpose.