Callaway Big Bertha Steelhead. The Callaway Big Bertha Steelhead fairway woods feature Callaway's patented S2H2 technology- 'Short, Straight, Hollow Hosel' This was Callaway's revolutionary design with the shaft tip running through the head of the club to the sole, allowing a shorter hosel for more clubhead control. Featuring a lightweight crown and Callaway's Golf Weight Chip Technology to produce a low centre of gravity for getting the ball airborne from the fairway (or the tee) nice and early.