Below and above, you’ll see some images of the Callaway Big Bertha Alpha 815 and Big Bertha Alpha 815 Double Black Diamond drivers.

The former is designed to offer benefits to all players, while the latter has been specifically crafted for competent players.

The Double Black Diamond dramatically reduces spin for distance increases on middled drives, while the regular Alpha 815 combines distance and performance with forgiveness.

Both drivers feature Callaway’s patented Gravity Core and RMOTO Technology, which enables engineers to produce an ultra-thin face and save weight.

Callway Big Bertha Alpha 815 images:

RMOTO Technology in the Big Bertha Alpha 815 driver saves weight, facilitating a lighter, thinner face for more efficient energy transfer and higher ball speeds.

The new driver features a multi-material construction to deliver a low CG, forgiveness and hot ball speeds off the face.

The centre of gravity can be moved up or down to optimise ball-speed locations to wherever you usually hit the ball off the face, thanks to Callaway’s Gravity Core.

Callway Big Bertha Alpha 815 Double Black Diamond images:

This Big Bertha Alpha 815 Double Black Diamond is made for competent golfers who are seeking ultra low spin for maximum distance.

Some three grams of weight have been saved in the face, while the Gravity Core has also been improved to push up or lower the centre of gravity further than before.

Both Big Bertha Alpha 815 drivers are avaiable from November 14, 2014. The regular driver comes with an RRP of £370, while the Double Black Diamond will set you back £399.

Click here to find about more about the Big Bertha Alpha 815 drivers