Product Features UNIQUE SHAD DART HEAD: pushes the water to the small willow blade allowing this lure to spin at lower speeds (.3mph) than other underspins on the market. HAND-TIED BODY: Fitted with five layers of rubber, flashabou, tinsel, and thread. VERSATILE: The Fin Spin Pro allows you to longline, spider rig, power troll, or cast it. You can add a curly tail, a minnow, or just fish it by itself. This lure was designed for crappie but works great for other species.