Make sure this fitsby entering your model number. The Big Bertha B-21 Driver is designed for distance any way you swing it. To help eliminate your slice or big miss, we’ve created our first high launch driver with an ultra-low forward CG for low spin. The large Big Bertha head is specifically engineered with internal draw bias weighting to help improve your launch angles and promote a straighter, longer ball flight. We’ve advanced our A.I. designed Flash Face to promote fast ball speeds across a more expansive area. This face architecture requires extremely strong materials that are lighter and stronger than traditional titanium to promote optimal speed, forgiveness, and spin characteristics.