In this period they also started to make tools out of bone .
Finally , after about 50,000 BP , ever more refined and specialized flint tools were made by the Neanderthals and the immigrant Cro - Magnons ( knives , blades , skimmers ) .
In this period Neanderthals also started to make tools out of bone .
Finally , after about 50,000 BP , ever more refined and specialized flint tools were made by the Neanderthals and the immigrant Cro - Magnons ( knives , blades , skimmers ) .