Nickent 3DX RC Combo Set 3H, 4H, 5-PW with Graphite Shafts: The 3DX RC hybrid/iron combo set comes with two of the 3DX RC Ironwoods to replace the #3 and 4 irons. The irons in the set (#5-P) feature a unique visible technology called Rebound Core. Nickent has been experimenting with vibration dampening with their ARC technology for a few years, and the consensus is that the buttery feel created by having an Accelerated Rebound Core is a playing advantage worth exploiting. The 3DX RC irons utilize a vibration-damping rubber material placed directly behind the hitting area of the clubface in the back cavity. It removes unwanted vibration on miss-hits creating a soft yet responsive feel. At the ends of the Rebound Core is even more vibration dampening material in Nickent's game changing XW tungsten-polymer weight inserts. Weight is spread to the extreme heel and toe by two XW inserts, making the head even more forgiving and more stable at impact. The inserts also absorb any extra vibratio