Great Big Bertha Driver Speed, Forgiveness, and Distance. The Great Big Bertha Driver is back, and it represents the next frontier in driver design. This advanced adjustable driver has a light, fast, stable chassis unlike any other Callaway driver. It's a technological breakthrough, and it's built to get the most distance for ALL golfers. Leave no yard behind with the Great Big Bertha Driver. Details Simple Adjustability Forgiveness and control from Adjustable Perimeter Weighting (APW), the 10 gram sliding weight on the perimeter of the clubhead adds stability, and the weight slides for more dispersion control to hit drives on line. Tests indicate that APW delivers up to 18 yards of direction-correction, which can dramatically tighten a player's distribution, promoting more distance. OptiFit Hosel The OptiFit hosel lets you choose from 8 different configurations to tune loft, lie and face angle. With the OptiFit hosel appropriately configured to the needs of each individual player, the result is a high launch angle and low spin-rate, the launch conditions that promote maximum distance. High Ball Speed From Next Generation R•MOTO Technology To get every last yard out of your driver, you need more speed. R•MOTO Technology provides structure for a thinner face, leading to high ball speeds on center hits and off-center hits too. Low Center of Gravity Great Big Bertha features a sophisticated design that pulls the center of gravity low in the head and rearward, away from the center of the clubhead, to make it easier to launch the ball at a higher angle while keeping backspin to a minimum.

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