I bought this for my 2-month-old Kashmiri Mastiff and it lasted for more than a year. He is strong active and energetic dog who breaks or chews of most other leashes. It was mainly to tie him out in the yard so that he could run around and it worked perfectly. It's really good for some exercise, play time. Most importantly its very strong with a steel interior to provide sturdy support. My dog can chew through anything but not this. This was my second order and the first time it lasted for more than a year so definately a must buy for big sturdy dogs.