These Traditional Bamboo Arrows are light and flexible. They have a spine stiffness of 400 meaning you can use them with any bow from 20 to 70 pounds. They shoot in a very straight line but don’t have as much of an impact and penetration as a heavier arrow. These arrows are the common choice of the eastern world as bamboo was. They don’t have a “whipped” thread to keep the fletching together but are glued to the wood giving the fletching more sturdiness whilst keeping the traditional look.