A floor cleaning implement, such as a disc brush, for use in a floor maintenance machine includes a core providing a female portion of a mating interface. The female portion has a central recess with a plurality of pockets extending radially outward from the central recess. Each of the plurality of pockets has a head section that is radially distal from the central recess and has a neck section that is radially intermediate the respective head section and the central recess. Each head section is wider in an angular direction than the corresponding neck section.
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