Video: Callaway talks Gravity Core

Unless you've been away from your computer screen, tablet or mobile phone for the past 24 hours, you will realise Callaway has revamped its Big Bertha driver for 2014 with Big Bertha and Big Bertha Alpha drivers.

For the first time ever, Callaway's Gravity Core lets the golfer transform the Callaway Big Bertha Alpha Driver by adjusting spin independently of launch angle for fully optimized ball flights and longer distance.

Callaway's SVP of research and development Dr Alan Hocknell explains more...

First Look: Callaway Big Bertha Alpha and Big Bertha Alpha drivers

Video: Callaway Big Bertha driver