During the 2018 excavation of a large Pitted Ware Culture site in Norvik, Nynäshamn, a large number of round-oval ground stone tools with one or more faceted sides were recovered. These probably served as hand stones and were likely used for crushing, pounding and grinding different types of materials. The abundance of these implements at Norvik stands in stark contrast to the apparent lack of them elsewhere, which raises the question of whether this reflects a prehistoric reality or sampling strategies during archaeological excavations. Through our investigation we have identified a comparatively small number of similar stone tools from Pitted Ware Culture sites on the Swedish mainland, Gotland and Åland. It would seem that these tools are somewhat hard to identify in the archaeological record, possibly due to the inconspicuous nature of ground stone tools in general. This might contribute to sampling bias during excavation as well as a tepid interest in doing research on them. We suggest that the inconsistent terminology used for these implements might present an obstacle for future research.