This Musashi Dark Stallion Katana sword features a hand-forged 1060 carbon steel blade that has not been fullered. The fullering process, sometimes called a bo-hi or blood groove, reduces the weight of the sword and allows for more nimble use of the sword. Thus, this sword is much heftier and can slice through thicker bamboo stalks because of its weight. The blade has also been clay tempered to produce a real hamon line and a blade hardness of 55 HRC. The full-tang blade has been double bamboo pegged to the hardwood handle for a truly battle ready sword.