hey Adrian- the hook is actually a single sz. 4 octopus trailer made by Matzuo. they call them "sickle" hooks, and the design rationale is that acute bend in the hook helps hold fish better....so far its worked very well. =) its a thin wire hook like the drop shots, so it penetrates easy, but it also has an offset so it "spins" easier as well. nasty lil hook. lets see that double you tied!