The Kulla or winnower, is used both in the household and in agriculture.
Households use it to separate chaff from rice. In the Kamatha it is used to remove chaff from paddy seeds.
Before first use, a ripe slim apple fruit is rubbed on its surface and lay a piece of cotton cloth on it for durability. Village women winnow the rice to a slow beat.
There are many varieties of Kulla used in Sri Lanka, the Rajarata Kulla, Medarata Kulla and Pahatharata Kulla is commonly used in the house hold. An indigenous dance is performed using a Kulla called the ‘Kulu Natuma’