Source: EXCLUSIVE! – The Callaway C-Shaped Driver!
The more weight you place in the heel and toe of the club, the better the club will perform for off-center hits. These weights will drastically reduce clubhead twisting at impact. The further away from the sweet spot these weight are – the better the club is at reducing twisting – this is why we saw that square driver trend. The other, often overlooked part of this design is the reduction of CC. 460, is the max, this club would likely be in the 300 range…. leaving a lot more room for manufacturers to play with. Finally when it comes to weight, a design like this can drastically cut down on the weight of the club, which ultimately leads to higher swing speeds.