African blackwood nunchaku

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“African Blackwood is a flowering plant in the family Fabaceae , native to seasonally dry regions of Africa from Senegal east to Eritrea and south to the Transvaal in South Africa . The tree is an important timber species in its native areas; it is used in the manufacture of musical instruments and fine furniture.”
———–wiki

African Blackwood is very heavy, its specific gravity 1.26, so this wood will sink to the bottom in water.