Four bolts and nuts secure cable's rack housing to helm Dual cable has one rack housing with two cables attached. Single helm works on both single and dual cable applications. Helm requires current generation rack cables (will not bolt up to older style cables) Helm has No FeedBack™ feature Helm/cable install as unit from back of dash Fits: SS151XX (NFB Rack Single Cable), SS152XX (NFB Pro Rack Dual Cable)
