The multi-metal Big Bertha Alpha 815 driver from Callaway is designed for low spin with forgiveness.
A Gravity Core is used to help lower centre of gravity, while RMOTO Technology offers a lighter, thinner face to create more efficient energy transfer, high ball speed and forgiveness with adjustability.
RMOTO offers weight saving that allows for a larger, more forgiving clubhead, while maintaining a lighter swing weight and lighter overall club weight with a thin face.
The Gravity Core allows the user to move the centre of gravity up or down and adjust ball speed locations to wherever somebody usually hits the ball off the face.
A Fujikura 53g Speeder Motore 565 as the primary stock offering, but no upcharge is offered on most other offerings including Mitsubishi Bassara 52,Matrix Ozik White Tie 50, Aldila Rogue 60, Matrix Ozik Black Tie 70, Fujikura 53g Speeder Motore 565, Fujikura Motore Speeder 665, Fujikura Motore Speeder 765, New Mitsubishi Diamana 62, Matrix Ozik Red Tie 60, Fubuki ZT 60, Fubuki Z 50, Aldila Tour Green and Mitsubishi Bassara 42
OptiFit Technology offers an adjustable hosel that lets users choose from a combination of eight different loft (-1, S, +1, +2) and lie angle (draw or neutral) configurations.
The adjustable heel and toe weights (one and seven grams) are used to control shot shape.
Callaway has also added the Big Bertha Double Black Diamond driver for players who hit the ball in the centre of the face most of the time.
The face is lighter from RMOTO technology and that leftover weight is used to move the centre of gravity low to reduce spin, while also improving stability on mis-hits.