İn picture we can see two different early era sharp tools. İn this paragraph we gonna write about differences of two different tools.
First differences are age of tools. Tool A is development 1.4 million years ago. As distinct from tool a is 0.6 milion years older than tool b.
we can see from picture that, tool b is more wider than tool a from front view. Despite that from side view we can see tool a is more wider. From back view again tool b is more wide, but they have nearly same widness. Overall, tool a has more conical shape, in the other hand tool b is more likely to leaf. Tructural desing of tool a good for penetration, in the other hand tool b has better sharpnes. From this picture we can also manage that, different stone age humans have different type of working style.
Main features of these tools sharpness and pierce. Because of that these tools have different structural shapes.