Callaway Steelhead Plus Fairway. The Callaway Big Bertha Steelhead Plus fairway woods are one of the most popular ever made with the small compact head design along with Callaway's patented Variable Face Thickness (VFT) Technology for efficient energy transfer at the point of contact with the ball - and a strong, penetrating ball flight. Callaway's Golf Weight Chip Technology ensures a lower centre of gravity which means more stability at impact and less club head twist from off-centre strikes.