The Carracks black sword, sometimes called a crab sword, is a type of sword invented in Portugal, during the 15th century, designed to be used by soldiers and sailors in ships and caravels in the Age of Discovery. It is characterized by having a guard with two protective rings, with the guard terminals in the form of two flat drops, the referred guard terminals facing toward the tip of the blade, and forming round large plates, sharpened to the point where they can be used as extra blades, because they can be convenient in close combat.