Featuring the new Iso-6 material technology, the Project X Catalyst Black .370 Graphite Iron Shaft is engineered to replicate steel alloy properties over 100% better than traditional graphite laminates. This allows for an extremely stable shaft that maximizes consistency and distance control while providing the benefits of a graphite body design. A reinforced tip section also delivers torsional resistance comparable to that of steel—improving stability during turf interaction for better impact on less than perfect shots. Design Iso-6 material technology, engineered to replicate steel alloy properties 100% better than traditional graphite laminates Reinforced tip section delivers torsional resistance comparable to steel – improving stability through impact, even on less than perfect strikes Designed to be extremely consistent from shaft to shaft, providing stability and distance control