Has anyone ever used them and if you have could you give me a review on them

I bought a pack of them a few weeks ago. They are very easy to install and work great. I went back to buy six more and it took me about 2 weeks to find them in any store. I know you can buy them from cabelas for $14.99 but I waited and found them for $10 so I bought two more packages. I would highly recommend them. Also they did make my groups a little tighter at 20yrds.

The best invention since sliced bread. You can do a dozen arrows in a snap. They hold up well too. Chris

Work very well.. Be careful where you get them. I bought them for $14.99, but I've seen stores selling them for $29.99 now.. be careful..