This is Ivan Shen's 2nd signature barrel and the secret lies in the gripping area. The 3 delta cuts at the back are the same height. There are 5 rounded delta cuts that are placed to prevent the barrel from becoming too grippy and each cut, as it gets closer to the center, has been raised slightly to assist in identifying the gripping position. This further assists in being able to easily push the dart toward the target. By widening the indent between the cuts that has been raised, the fingers fit right inside the indentation. This allows for an efficient energy transfer on to the barrel when thrown. The front of the barrel has spiral cuts to enhance the design of the barrel.
It is definitely a barrel for those that want to improve the trajectory and how the dart flies.