The design of the Troll-Tech Crappie Casters allows anglers to Tight Line Troll, Spider Rig, Slow Troll, Carolina rig or Vertical fishing techniques. The brightly painted Troll-Tech Sinkers come in fluorescent colors that will attract game fish to your bait or lures in heavy stained or clear waters. Troll-Tech Crappie Casters are swiveled and prevents line twist. Troll-Tech Crappie Casters are great for night fishing too!