The Callaway Big Bertha REVA fairway woods are offered in 18 (3 wood), 21 (5 wood), 24 (7 wood), and 27 (9 wood) degrees of loft. , The Callaway Big Bertha Reva Fairway Woods offer traditional lofts. 15 degree 3 Wood, 18 degree 5 Wood, 21 Degree 7 Wood, and 24 Degree 9 Wood. , The 3 wood in the Big Bertha REVA has a loft of 18 degrees then the 5 wood is 21 degrees and the 7 wood is 24 degrees.