#bow_drill
Bow drill
Drilling tool of prehistoric origin operated by the cord of a bow
A bow drill is a simple hand-operated type of tool, consisting of a rod that is set in rapid rotary motion by means of a cord wrapped around it, kept taut by a bow which is pushed back and forth with one hand. This tool of prehistoric origin has been used both as a drill, to make holes on solid materials such as wood, stone, bone, or teeth, and as a fire drill to start a fire.
Sun 14th
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