Hundreds of years ago, the Japanese discovered a simple truth; that to become a good swordsman you'll have to practice, a great deal. To become a great swordsman you'll have to practice with a "live blade". And during the period between "good" and "great", you should spend your time building your skills and confidence enough to wield a razor sharp Katana safely and effectively. To accomplish this, the Japanese relied on a simple wooden sword called a bokken for much of their training. Authentic Kashi wood Bokkens are still used today, but are becoming quite costly. They also have the disadvantages, being made of wood, that they may rot, crack split or splinter. Cold Steel's solution to these dilemmas was to design a synthetic substitute, low in price and impervious to the elements. Made of polypropylene. Closely resembles the "live blade" in terms of weight and size. While they're not quite as rigid as wood, they have the advantages of being virtually unbreakable and remarkably stiff and cut resistant. This training aid will not rot, crack split or splinter. Minimizes the possibility of causing grievous or permanent injury to those who used it.