Make sure this fitsby entering your model number. New Forged Ring Construction. Forged from a lightweight and high strength aluminum that is milled to an exacting shape, it unites a massive rear weight, a full carbon sole, crown and a new milled back cup face. SIM Inertia Generator. The asymmetric Inertia Generator is designed to provide faster club head speed through advancedgeometry and aerodynamic analytics. Speed Injected Twist Face. Improves ball speed by calibrating each head to the threshold of the legal speed limit with corrective face curvature also protecting against heel and toe mis-hits. Thru-Slot Speed Pocket. Our most flexible Speed Pocket design engineered to maximize ball speeds and produce additional forgiveness on low face strikes. Split Mass Weighting. Designed to enhance forgiveness while allowing for pinpoint target swing weights during custom assembly.