BK4b is the largest spatial association of stone tools and faunal remains in Olduvai.
BK4b has provided compelling evidence for megafaunal acquisition and consumption.
The obtainment of flakes was the principal aim of lithic reduction.
Hominins would make sharp-edged cutting flakes preferentially for butchering at BK4b.
Other subsistence activities linked to percussion tools were carried out at BK4b.