OPST Intruder Wire is perfect for adding a trailing hook to you steelhead flies and intruders. Use in combination with your favorite shanks. Works with OPST Shanks, Senyo Shanks, or any of the Fish Skull Shanks. Tie a loop of wire off the back of the shank long enough to be able to change trailing hooks. We like either the OPST Swing Hooks, Gamakatsu Octopus hooks, or Daiichi Intruder Hooks for use with this wire. Best with hook sizes 6 and larger.