The XBolt Crossbow bolts can withstand the power of the latest crossbows, fly true and have the knock-down power needed to get the job done. The XBolt Crossbow bolts are optimized with the EFOC (Extreme Forward of Center) design to help stabilize the arrow in flight. The XBolt includes half-moon nocks and a specially-designed brass insert. Victory s Spine Alignment process increases the accuracy and they come hand-fletched in Bohning XVanes or Fusion X-II vanes.