OPST's Intruder shanks are designed for tying flies with dumbbell eyes. The returned eye creates a platform for the dumbbell, lead, tungsten eyes to lie securely, increasing stability and preventing the annoyance of spinning and insecure eyes.
OPST has found a supple, durable and highly fishable intruder wire for all of your trailing hook flies. OPST wire is the ideal diameter- thin enough to fit through hook eyes with ease but with enough body to secure tightly with thread. In blue and red, per 1 meter.