The spinner shaft shank
In the attached image I have shown the spinner shaft as it comes. Notice the end is formed so that all you need to do is attach the hook then wrap some thread around the shaft. You could also use a bead
On the other end of the shaft I use a pair of round (smooth no teeth) jaw pliers to form a closed wire up turned loop which is identical to the eye on most salmon or steal head hooks.
The lower immage shows the shank with a #8 Gami. sea hook. The total lenght of the shank with the hook is 3-1/2 inches long from end to end.
Just put it in the vice and tie whateverr you like. You can obviously tie some really big patterns with this.
What I like about these is the whole thing is somewhat flexible, the wire has a bit of a spring to it, and the small hook penetrates and holds very well.