I have never used it before, mostly fiberglass. I don’t know how long it will last, but the guys said it’s a useless thing. It's better to buy from Klein Tool and use. But for the money it sits well on the shelf.
As a cable tech I run my line through smurf tube everyday. Sometimes these tubes are jacked up, missing a string or the string breaks. This bad boy will glide through 99% of smurf tubes with minimal pushing.
This product is awesome! It did exactly what I needed to do. I was able to easily fish this fiberglass flexible rod through 30 feet of plastic conduit with little trouble even with a few turns in the conduit. I love this product!
Aleksandr Gazizov 
Robert 
