Callaway’s Big Bertha Alpha 815 Double Black Diamond Driver is designed for players with high swing speeds, and who need significantly low spin rates to maximize distance.
There’s lots of customization available in this club. The Gravity Core lets a player adjust the center of gravity for higher or lower spin rates. Loft, lie ange and draw/neutral settings are available in the OptiFit hosel. Adjustable weights in the heel and toe help shape shots.