Shaft: Callaway Big Bertha RCH 45 Driver Shaft. Adaptor: Callaway 2nd Generation (Fits X2 Hot, Great Big Bertha 2015, XR, XR16, XR Speed, Alpha 815, Alpha 816, Fusion, Epic, Rogue, Epic Flash, Mavrik, B21, Epic Speed, Rogue ST, Paradym, Paradym Ai Smoke & Elyte Drivers).
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