Features: KBS TOUR Graphite Irons are the first graphite shaft to play like steel with optimized weight and stiffness for players to gain maximum performance. Designed with the same EI curve as KBS Tour in multiple weight classes fitting junior players to Tour Professionals. Swing speed recommendations (#6iron) for KBS TGI Tour: KBS TGI 50g = 65mph or less KBS TGI 60g = 65mph - 70mph KBS TGI 70g = 70mph - 75mph KBS TGI 80g = 75mph - 80mph Trimming Instructions