African, but what for ?

[Luc LEFEBVRE]

Someone asked me to identify this object.
Sure it's African, sub-saharian.
Made of wood covered with leather with a bronze "hammer" and a bronze removable cone at the top.
It don't look like a weapon, even a recade, surely a tool.
But what is this kind of hammer and cold used for ?
Salt, camel ??
Thanks for your help.
Luc