No knots needed! Atlas-Mikes Magic Thread makes sac tying easier and faster. Simple, fast, and effective just three wraps around the stem of the sac, a pull, three more wraps, and another pull does it. Magic Thread is also an excellent bait saver. Simply wrap it around your shrimp, herring crayfish or minnow bait for a secure hold. 100 per spool. Color: Orange. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Soft Baits.