The 80 lbs self-cocking crossbow comes with 39 aluminum arrows and two 80 lbs strings. "Self-cocking" crossbows allows you to shoot repeatedly at a faster rate than normal crossbows. The feature means it's easy to load with your hands and you don't have to use much force. Being much faster than others, this crossbow also won't break easily with its simple and safe fiberglass prod. There is also an "auto" safety that gives greater control and Precise string alignment ensures accuracy.