Fishmadman's Tube Ska-Opper is tied on the "riffling hitch tube" which allows the angler to purposefully thread on one side or the other your leader or tippet and control the way your fly skates. This fly does not come with a hook so you will need to add a short shanked stinger style hook prior to tying it on. The small version of this fly and a #6 hook is recommended, medium #2,4.