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. • VERSATILE: The Fin Spin™ 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.