The alternative to coated hooklinks. Stiff-In works the opposite way. It has a stiff monofilament inner core and covered with a soft braid. Same principle as leadcore, just with mono and braid.
Stiff-In packs many advantages compared to other coated hooklinks:
Ideal for tying Combi-Rigs: The stiff core can be pushed out to give you a soft section infront of the hook.