Lightweight wooden plank reinforced by four horizontal bands of bound rattan. The obverse is always adorned with a complicated curvilinear decoration, the central element of which is the head of a demon or "antu gasi" with large circular eyes and mouth bristling with fangs.Also known as "udoq" or "kambe" according to Bernard Sellato, is invested with powers to ward off evil spirits. The lower and upper registers show pairs of "aso" sort of dragon dogs, underworld figures. On the reverse intricate design twist around the grip, their bodies terminating in tight coils. Painted with natural earth pigments (tree sap).