This club started with the design concept from the original Great Big Bertha – to use titanium to make a driver that is large and forgiving. Then they combined it with technology from the ERC II Forged Titanium Drivers to give a vastly improved series of drivers under Great Big Bertha name. The Great Big Bertha II+ Titanium Drivers all feature a powerful 380cc club head that is more than 130cc larger than the original. They have also been designed with a precise centre of gravity geared to produce the most favourable launch angle and spin rate for each particular loft. This is accomplished through advanced production processes that tightly control the wall thickness and weight placement within each club head. Each loft is designed with the most beneficial combination of bulge and roll, centre of gravity placement, COR and MOI to produce a hot, strong ball flight and forgiveness across the face of the driver. The standard versions are designed with progressive draw bias to help golfers square the clubface at impact and hit the ball with a strong, drawing ball flight. The drivers utilise a proprietary series of high-performance graphite shafts. The GBB System 60, GBB System 60 Pro Series and GBB Gems 50 shafts are lightweight, low resin-content graphite shafts with high strength and exceptional responsiveness. The standard shaft for the regular Great Big Bertha II+ Titanium Drivers are the GBB System 60.