The article concerns one-piece belt-hooks with hooks pointing in opposite directions referred to as J. Kostrzewski types Ib and IIb. The diversity of their shapes and body formation, as well as the various forms of the long attachment hook, made it possible to distinguish several varieties and variants. The recent state of research shows that the titular belt-hooks, used from phase A2 of the Late Pre-Roman Period, were characteristic of the women's attire of the Oksywie Culture and the Oder Group of the Jastorf Culture communities. In the case of the former cultural unit, the impetus for the manufacture of some belt-hook varieties was familiarity with imported belt fasteners. [ABSTRACT FROM AUTHOR]