The Big Bertha B21 driver is Callaway’s first high launch driver with an ultra-low forward centre of gravity for a more consistent ball flight, and more tee shots on the fairway. The massive clubhead is engineered with internal draw bias weighting to help improve your launch angles and promote a straighter, longer ball flight. Advanced A.I. designed Flash Face increased the size of the sweet spot to promote fast ball speeds across a bigger area of the face.