The zatula (), also known as the rubal, rubel, rebra, kuchelka, kachanka, and kachalka, is a Ukrainian washboard also occasionally used as a folk percussion musical instrument.
The zatula consists of a piece of wood with grooves carved into it. A wooden rod is run over these grooves to soften clothes after washing. A musician plays the zatula in a humorous way, by placing the rounded rod under the chin and using the zatula as a bow, playing over the rod, or vice versa. The rasping sound thus produced is similar to that of the derkach.
See also Ukrainian folk music Washboard
Sources
Humeniuk, A. Ukrainski narodni muzychni instrumenty, Kyiv: Naukova dumka, 1967 Mizynec, V. Ukrainian Folk Instruments, Melbourne: Bayda books, 1984 Cherkaskyi, L. Ukrainski narodni muzychni instrumenty, Tekhnika, Kyiv, Ukraine, 2003 - 262 pages.