KT Wing Air DDKT Wing Air DD Direct Drive Hard Handle Wing Jason Diffin: Direct Drive. Hard handles. Maximum control, maximum durability, maximum flight time. The Wing Air DD (Direct Drive) is the latest creation out of the KT Surfing R&D department. The DD sits alongside the original Wing Air, featuring hard handles and strengthened construction of the Leading Edge (LE) and Strut. With two ply dacron construction around all high stress areas of the LE and strut