
The spear is a tool that has been used by human with a long history. It was developed by early humans for different purposes, including hunting, finishing and even war weapon. Usually, it consists of a long shaft and a pointed head. Spear head is the tip that mounts on a long shaft. In ancient times, when it was used for hunting, the metal spearhead was shaped like a triangle, lozenge, or leaf. While, for finishing, the spear heads usually…