Animal V4 Full Guard Sprocket (Black) (28T)

It's 7075 aluminum. 7075 is very strong but it is relatively brittle. If you attempt to force your chain on/off teeth may snap. A steel chain will always win in a fight with an aluminum sprocket. Do yourself a favor and remove/install your chain properly.
This is a nice, well made sprocket. I gave it four stars because it is not compatable with all cranks. I had to grind an angle into my crank sprocket-bolt hole because it did not sit flush. Not a huge deal but could be a deal breaker.

Really hate to say this, but this sprocket is a mess. I literally have a missing tooth after owning it for 24hrs, riding it around a parking lot, and taking my chain off a few times (without any tools, took chain off by hand with low chain tension). the kmc 510 chain i run seems to be far too strong for this sprockets teeth, as it has completely chewed them up just by removing the chain. i dunno what happened to Animal but this is not the product i expected to recieve having run Animal parts since at least 2006.