The Mason Downunder Wire is a single-stranded, stainless-steel trace that will stop toothy fish from cutting through your line. 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. It is extra-strong and kink-resistant so that the wire trace doesnt curl and alter the natural action of your lure when you are trolling. It has a small diameter so you can wind the wire trace onto most sizes and styles of reels, in order to get the fish right next to the boat. The Mason Downunder Wire has a line rating of 40 pounds and comes with 30 feet of line.