I think you must have simply gotten a bad spool of it for some reason. It is tougher than the Magnum Gator line by quite a bit as far as durability goes. I use my trimmers for a lot of stuff besides grass, like thick fibrous stemmed weed stalks up to about 3/4" and I have several places that small saplings keep sprouting up. I use my trimmer line on them too, as long as they aren't over approximately 1/2". Most other lines will snap off fairly quickly. Gator Magnum works awesome, and the Platinum ST is even better at this type of work. I have a lot of chain link fence to do as well, and I didn't expect it to do as good as Gator Magnum, but it actually lasts longer IME.