STEEL CHINESE BUTTERFLY KNIVES Beautiful in design and handcrafted in wushu steel. The ancient Chinese used the Butterfly knives as a double short length sword with a unique handle to catch the longer swords in between it's handle. Made of forge steel with a very light bendable blade used for demonstrations and competition. Blade is un-sharpened with a length of 13.5''. This item is a practice training aid only and should not be used for full contact training.