Cowichan Spinners are used with Radiant Spoons or with the buck tail Fly, even a worm. They are great to add to your line above and spoon or lure if your on a Lake trolling. These fellows add extra flashes of light that gives the impression of a school of fish ,in this way the spinners help draw the Game Fish to your Fishing Lure. they come in Mother of Pearl and Nickel. They both come in 4 sizes. Cowichan spinners definitely add a plus to your Fishing set up.