Flint hand axe found in Winchester. A hand axe, today often known by the more neutral term biface, is a stone tool with two faces typical of the lower (Acheulean) and middle Palaeolithic (Mousterian), and is the longest-used tool of human history.
Unless you are actively learning primitive survival skills or studying bushcraft techniques, no one has any intention of deliberately putting themselves in a situation where they have no choice but to rely on their wilderness survival skills.
Hand-axe, dating from 300,000 to 150,000 BC. The hand-axe is regarded as the prehistoric equivalent of the Swiss Army knife. This tool had a great many uses: cutting branches, felling small trees, quartering and skinning animals, working skins, and so on. A hand-axe lasted a long time, for it was possible to sharpen the tool time and again. Learn more: http://www.rmo.nl/english/collection/highlights/netherlands-collections/hand-axe