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Traditional Japanese swords like Katana and Wakisashi are usually forged with a single blade. Of course, the blade refers to the sharp side of the blade. When using katana, Wakisashi, and other traditional Japanese swords, only one side of the blade is sharpened like a razor, while the other side becomes dull and flat. But not all swords are forged with a single edge. Some are forged with two edges. It is called a double-edged sword, and its design is completely different from a single-edged sword. So why do some swords have two edges instead of a single edge?
Suitable for thrust attack
One of the reasons some swords are forged into two-edged swords is because it allows better stab attacks. For example, in Europe, swords like daggers are forged into two-edged rather than one-edged swords so that samurai can use them for stab attacks. Although a single-edged sword can be used, due to the two blades, a double-edged sword is more lethal when pierced.
Increase armor penetration
Double-edged swords are also more effective at penetrating armor than single-edged swords. However, this is more of a side benefit, because double-edged swords are more suitable for stab attacks. In the Middle Ages, European warriors would use double-edged swords to make stab attacks to penetrate enemy armor.
Prevent the enemy from grabbing the blade
The third benefit of the double-edged design is that it prevents the enemy of the warrior from grabbing the blade. With a single-edged sword, the enemy may grab the blunt edge of the blade. However, this pair of double-edged swords is impossible. Both edges have razor-like sharpness, and there is no safe edge to grasp. If the enemy tries to grab a double-edged sword, he is likely to be severely injured.
Disadvantages of using a double-edged sword
Of course, using a double-edged sword also has some drawbacks. First of all, double-edged swords are easier to break than single-edged swords. This is because the single-edged sword has a thicker and stronger side-the blunt side-which stabilizes the sword. In a double-edged sword, both edges are sharpened. Unfortunately, this makes the sword more likely to break on contact or pressure. Double-edged swords are also more difficult to maintain and more time consuming. They do not need to sharpen a single edge, but need to sharpen two edges.