It's awesome. I love crmo sprockets. They last a long time, I was a little sketched out by the two products that were availble in crmo.. The tree sprocket and the kink astro. Well, I "took a risk" and decided to buy the kink astro. I liked the design...and it has 1/8 teeth compared to the 1/32 that the tree sprocket has. There isn't really much to them in terms of material. They both look like thin, piece of garbage that will break under any ammount of force. Well The kink isn't, it's pretty tough. I won't say it's solid, it makes the pedals feel "spongey or springy" while cranking your bike. I actually like feel it gives.