Maximise the current with your essentials The sphere-shaped Starfish Ball Sinkers are designed for accurate casting, especially against the wind. Great for running sinker rigs, where the main line is threaded through the sinker and left unattached. They don't hold the bottom well but that's their advantage. They are ideal when fishing current in fresh or saltwater when you want your bait rig to move around, covering more area, but while keeping the bait near the bottom.