UST Mamiya Recoil Dart 90/105 .355RECOIL DART IRON SHAFTS ARE DESIGNED TO PROVIDE INCREASED CONSISTENCY, OPTIMAL FEEL, AND PRECISE BALL FLIGHT FOR ALL GOLFERS. Recoil DART 90 and 105 iron shafts will come as a constant weighted tapered set. Recoil DART has been designed after years of research, testing and development to precisely optimize shaft hoop stiffness in the critical areas of the golf shaft. To achieve maximum distance, optimum hoop stiffness is designed into the energy