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I think that they are there for the same reason as an Atara (soThese knots help ensure that one could tell the front pair of Tzitzises from(which are holier) are not accidentally moved to the back).
I think that they are there for the same reason as an Atara (so that one could tell the front pair of Tzitzises from the back).
These knots help ensure that the front Tzitzises (which are holier) are not accidentally moved to the back.