U.S. Air Force Contour Fit Head Cover golf Set. Set includes 3 stylish contoured Head Covers with innovative materials and sleek design - numbered 1, 3 and X. The #1 fits all oversized drivers, Nylon sock protects shafts from damage. The #3 fits all 3 woods and the X fits most hybrids and secondary woods. U.S. Air Force Golf Contour 3 pack Head Covers