Atlas Mike's MAGIC" Thread makes sac tying easier and faster. Just three turns around the stem of the sac, pull tightly; three more turns and pull tightly again. That's all. No knotting required. Simple and effective. Atlas Mike's Magic Thread is also an excellent bait saver. Wrap around bait on hook or lures to hold bait on longer. (Shrimp, herring, sardine, salmon roe, crayfish. minnows, etc.) 100 feet of Atlas Mike's "Magic" thread per spool.