The following image depicts an Oldowan stone tool from Tanzania 2.4-1.7 million years ago. The edges of this tool were used for scraping, chopping, boring, and hammering.
The following image depicts an Acheulean stone tool. The Acheulean tool industry was more complex than the Oldowan and existed from 1.5 mya to 250 kya. A variation of tools were produced and they were made to be much sharper. Acheulean tools were used for cracking nuts, hunting, dehiding and defleshing carcasses, and sculpting wood.