Hi Seas Grand Slam Fishing Line. From ultra-light to big game- Grand Slam is up to the challenge! Its formulation provides high impact strength- excellent abrasion resistance and superior knot strength. Its equally at home on conventional and spinning tackle. Every yard is computer checked for consistent diameter and breaking strength to provide you with an unequalled level of performance – performance you can rely on. Thats why we say with confidence – Grand Slam is BIG FISH TOUGH!