Cobra Boys KG F6 8-9#1 Driver, Right Hand, Graphite, Black Free shaft upgrade-since kids grow very quickly, we are continuing the free shaft upgrade option with the King F6 junior driver Myfly with SmartPad-the Myfly8 Technology allows junior golfers to easily adjust their loft as their game and swing develop to maximize distance, manage trajectory and Dial in the club to match their game Free shaft upgrade options: typical age 8-9 39 inch junior shaft recommended loft 13.5 Free shaft upgrade options-typical age 10-11 41 inch junior shaft recommended loft 12.5 Free shaft upgrade options-typical age 12-14 43" junior shaft, 44.25" women's shaft, or 45.75" Adult Lite flex shaft recommended loft 11.5