Yeonjamae is an ox or horse-pulled millstone used for threshing or grinding grain. Jeju people used to call this Malbangae, Malgorae, MalGurae, or MalGeurang in the past. Yeonjamae was indispensable as farming equipment for Jeju people, whose diet mainly consisted of barley and millet. Most Yeonjamaes were put together by the village as communal property, and the villagers organized a group to manage and operate it. There was 1 millstone for 30 households, on average.

This is an oil press for rapeseed oil or sesame oil. It is composed of a top stone and a bottom stone, and the bottom stone is specifically referred to as “Bongaegi”. Pressing the top stone of the oil press would extract the vegetable oil, and the bottom stone has a round groove for collecting oil. This large-scale oil press would be used by a whole village as communal property.

This bowl was used for soaking barley in water before grinding, and there is a hole in the bottom of the bucket to drain water. Most Boritong were made of a rolling stone of the Yeonjamae. The Boritong had always been placed near the Yeonjamae, and disappeared together with the Yeonjamae.