Possibly one of the best clips I have ever used, time will tell. The clamps are nylon so should not become brittle over time. Clamps provide 360 degree clamping force and are reusable (slide locked ends to sides (90 degrees of locked teeth)). You need multi-tooth pliers or clip-on pliers. I found a problem: there is no hose clamp for all sizes. No information on operating temperatures for nylon clamps. Very good price for the collar.