Collections from other MSA/LSA sites, including other Howiesons Poort tradition sites, have bone points in their assemblages which are also believed to projectile points. One at Peers cave appears to be an arrow point, while large more robust points have been found at Blombos and are believed to represent spear points.
The bone points in the image come from various deposits at Early Modern Human sites in South Africa, including MSA deposits at Blombos Cave (a), Peers Cave (b), Sibudu Cave (c) and Klasies River (d); Later Stone Age layers at Rose Cottage Cave (e) and Jubilee Shelter (f), and an Iron Age occupation at Mapungubwe (g).
Note the robusticity of the Blombos points compared to those from later contexts, and reduction in size between the Still Bay and the Howiesons Poort , and between the HP and the LSA. Apart from a large flat point from Still Bay layers at Blombos Cave, burin-like scraping is typical on MSA points, while later points evidence shaping through scraping and grinding.
Source
Backwell, Lucinda, Francesco d'Errico, and Lyn Wadley 2008 Middle Stone Age bone tools from the Howiesons Poort layers, Sibudu Cave, South Africa. Journal of Archaeological Science 35(6):1566-1580.
