In order to establish the size of certain lands, whether they had agricultural or forestry purposes, different units were used, depending on the area and historical period, but also different measuring instruments. One of the most archaic tools of this type is the wooden chain link. Quite commonly used until the early 20th century, these pieces had different lengths depending on the area and they belonged to the village communities. Making such a chain link requires a lot of skill and special technique, given their remarkable monoxyle structure. The piece in the image is 305 cm long, it comes from Merești, Harghita county and it is in the patrimony of the Transylvanian Museum of Ethnography.