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.