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The Krai Silai (which means "great sword") or simply called Tanimbarese sword, is a sword originating from the Tanimbar Islands, Indonesia. It is also called Lofu in Seram Island.
In the past, the Krai Silai is used in a solemn single combat, in which people stood opposite each other, armed with a Krai Silai and separated by a bamboo fence at chest height. In ordinary circumstances, the old men simply wore their hair wound around their heads, futoe ngwine, held up by a court cloth, moselai, and secured with a comb.