1.Package including: you will receive 30 pieces of dart shafts and 30 pieces of rubber o-rings, the abundant quantity and multiple colors can satisfy your various preferences, ing you many possibilities of replacing the one you want 2.Locking hole design on the shaft: these aluminium alloy dart shafts feature with a locking hole, which can allow you to use leverage to attach the shaft to dart barrel firmly, no worry that the shaft may fall off during use 3.Suitable for indoor activities: these harrow dart shafts can act as a good sporting item to develop indoor activities, without the trouble of rain or bad weather; At the same time, they can also exercise your hands-on ability and body coordination ability for a good sport experience 4.With rubber o-rings: these alloy dart stems are equipped with a rubber o-ring, which can keep the dart shaft securely, to make their path more stable and fluent; So you can enjoy much fun from it with your family or friend