This is a beehive ventilation discs, used in beekeeping.
They are made of durable plastic and are designed to be installed at various parts of a beehive to control hive temperature by rotating disc to allow ventilation or close the vents to allow warmth inside the hive.
The ventilation holes ensure proper airflow and help regulate the temperature inside the hive.
These tools are practical accessories for beekeepers to manage and protect their bee colonies.