Answer (1 of 4) Doubleedged blades date back to the Paleolithic Age, so some caveman must have thought it was a good idea, and others agreed and they exist to this day My guess is that someone liked cutting with an arrowhead or spearheadDouble Action OTF knives automatically extend and retract by using a sliding button or lever Double action OTF knives are considered easier to use, but are more expensive compare to a similar single action knife Below you find our complete selection of double action knives Please be advised that blade movement is a normal part of any out theThe ability to wield double ended weaponry with profound skill Variation of Weapon Proficiency DoubleEnded Weapon Proficiency Users are able to demonstrate a natural aptitude for the ways of the double sided weapons The user is able to wield weapons with different/same kind of striking end (ex a sharp blade or a blunt object like a mace) with great proficiency in speed, power, and
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