Verified Purchase(What is this?)
This review is from: Sks Acd218B Chainguard - Silver, 42-44T (Sports)
The metal bracket that goes on behind your crankset doesn't actually fit on most bikes! The videos show this thing you unscrew, pop the bracket on, then screw the thing back on, my mountain bike doesn't have this and I haven't see any other bikes in the wild with this screwy bit.
Managed to get it on in the end, but it's all loose and scraping against my pedals and all that. If you need a chainguard, don't bother with this, get something that screws onto your gears.