These are circular discs for attaching to a plough and preparing land for production. They are made of metal. The items are too lightweight for use with a tractor – probably push or horse related farming attachments. Four-sided square nuts date object to prior WWII (as per Stu McNolty). These implements were manufactured but are very lightweight.
Source:
Found in Collection (FIC)
Date of Object:
ca. 1940
Dimensions:
a) 18 cm Dia., 13.5 cm H, b) 18 cm Dia., 13.5 cm H