From ultra light to big game, Grand Slam monofilament is up to the challenge. Co-polymer formulation provides high impact strength, excellent abrasion resistance, and superior knot strength. It's equally at home on conventional and spinning tackle. Every yard is computer checked for consistent diameter and breaking strength to provide you with a level of performance unequalled in its price range. performance you can rely on. That's why we can say with such confidence - Grand Slam is BIG FISH TOUGH!!