This kind of weapon is classified in the throwing knife , because at the origin this general F shaped weapon was made to be thrown.But for some models the form and weight as changed and it became a sort of handed weapon.
I have test some TK, the F shaped of this region have a bad performance,an efficiancy range of 20m max.Difficult to have a good flight, after 3 or 4 spinning, the angle, direction and speed change.No chance to get the target.
The people of this country (Mandara mountains) use at first bows and arrows (poisoned), javelins, swords and battleaxes, clubs and sticks.
TK are used for personal protection on journeys and at night, they form part of the attire of the adult male and are also used as dancing ornaments.
Tk of the Congo have better performances.
But I like the shape of these F TK.
Luc