The barrels are knurled (rough) and ringed to assist the player in achieving consistent finger placement. This helps you to achieve greater accuracy as you hold and release the darts the same way with each throw. We received these darts without their retail packaging so there is no case. We originally sold them with extra flights but we are now including a set of DMI 10g Beta darts that we also received with the Supra. In addition 40 sets of tips are included.