How did adding handles improve early stone tools?

The process of hafting—the fitting of a handle to a piece of sharp stone—was a momentous innovation that significantly enhanced the effectiveness of early tools.12

Adding a handle improved stone tools in several key ways:

• Enhanced Control and Protection: In its simplest form, a handle (such as a bundle of grass or leaves) protected the user's hand while using a sharp rock as a knife.2
• Increased Kinetic Energy: Mechanically, the handle acted as a force-transmitting intermediary between the user and the toolhead. By extending the radius of the swing, the handle allowed the toolhead to move faster, delivering a more powerful and telling blow than the arms could provide alone.2
• Greater Versatility: Hafting enabled the creation of new, specialized tools and improved existing models. For example, while a person using a hand-held axhead could only cut small trees, a hafted ax allowed for the felling of trees of almost any size.2

Ultimately, hafting endowed tools with better control, more energy, or both, marking a critical step in the evolution of human technology.12