The domain contains 8 conserved cysteines that may bind to zinc. In S. pombe this protein acts as a protein linker which links the chromatin modifying CLRC complex to RNAi by tethering it to the RITS complex. The region is reported as a LIM domain here, but has a slightly different arrangement of its CxxC pairs from the Pfam LIM domain Pfam:PF00412, hence why it is not part of that family [1]. The tandem zinc-finger structure could mediate protein-protein interactions.

1: Stc1: a critical link between RNAi and chromatin modification required for heterochromatin integrity. Bayne EH, White SA, Kagansky A, Bijos DA, Sanchez-Pulido L, Hoe KL, Kim DU, Park HO, Ponting CP, Rappsilber J, Allshire RC; Cell. 2010;140:666-677. PMID:20211136