Two of the stone tools analyzed were made using the Levallois knapping technique of the Levant Stone Age, in which a flint stone core is essentially flaked away to make a point that can cut and hack.

Six tools, two cores and four flakes were found, the majority of which were made of local flint of the ... An Intermediate Bronze Age (EB IV) Site in the Ayyalon Valley. ʻAtiqot 69:75-140. Rosen S.A.

so Stone Age people needed sharp, strong tools to cut trees down and to hunt the animals for food. And this is where a stone called flint came in. There's a real skill to making tools out of flint.