In some part of rural Cambodia, grinding mrotar is popularly used for grinding rice to make various kinds of cake and food. The grinding motar is made of two pieces of stone. The upper stone has hole in the middle through which rice can be placed. The bottom part has a core to hold balance of the whole tool, and it pertains engraved trace on its surface that allows grinding rice to come out. The final grinding powder from rice is collected from tunnel engrave around the bottom part of the grinding mortar. Handle is needed to move the upper part of mortar so that the grinding process work.