As a result, my airstream became much more stable! They are expensive but worth it in my opinion. The only gripe I have with them is that the ratchet doesn't work very well when loosened - for example the ratchet doesn't snap very easily after initially loosening. Also, the locks don't match the stop anywhere. It's weird recording something like that when it doesn't even fit. All in all, too bad I didn't get X Chocks much sooner. Great for stability. This is not a replacement for traditional pads! Just extra stability.