Wapsi Fly Propellers allow you to customize any fly pattern with added flash and vibration. These fly propellers can be placed anywhere on the hook shank you like when tying the fly. A small dimple around the hole reduces contact with the hook eye and bead to facilitate spinning. Fly propellers make a great addition to any fly pattern, but work exceptionally well on streamers such as wooly buggers. The added weight and flash of the fly propellers can make all the difference during a slow day on the water.