The Mason Multistrand Wire features 7 strands of stainless steel wire that will resist rust in both fresh and saltwater environments. It is specifically-designed for trolling, due to the flexibility, strength and abrasion-resistance that is required during trolling. It can also be used to prepare rigs or leaders if you dont want to wind the entire length onto your reel. It is extra-strong and pre-straightened, so that the wire trace doesnt curl and alter the natural action of your lure when you are trolling. Theres nothing worse than losing one of your all-time lures to a shark, mackerel or barracuda. Lures are getting more and more expensive to replace, so make sure you have some wire trace handy when trolling with lures offshore. If you are targeting school or Mako sharks, then you simply must use a wire trace. The Mason Multistrand Wire has a line rating of 140 pounds and comes with 30 feet of line.