Patented No FeedBack Steering Control for about the cost of an old-fashioned steering replacement. With the advantage of 4.2 turns lock-to- lock and our patented No FeedBack steering to lock out steering loads, Teleflex s 4,2 Rotary NFB Steering Systems are the most revolutionary advance in mechanical steering in many years. Available with a single cable configuration for most boats and dual cable for application with engine flutter or steering instability.