Rory McIlroy surprised many just before the New Year's when it was reported he would use Callaway irons and woods, including the new GBB Epic Sub Zero Driver.
This week the company released the driver and a video explaining the new technology behind it.
The attraction of the new club is that it's an "extremely fast and low-spinning pro-style driver that is also extremely forgiving," according to Alan Hocknell, the manufacturer's Senior VP of research and development.
