I have got some of these off Swinks and must say they are one of those things where you think, "why didn't I think of that."
Very quick and easy to install. They are bloody strong, you can't just push them onto the post, you need to slide them on from the top. When you buy some of these you buy them knowing that it will be a one off purchase, they aren't going to break and you can re-use them over and over again.
I dare say for those environmentally conscious, these are eco friendly compared to cable ties that are only a 1 use throw away item with considerable waste involved.
Great little item and well worth the initial outlay.
Best of luck with it Swinks.