First of all, these are not original fenders. They are narrower than OEM. The build quality seems to be on par with automotive plastics, but I'll have to work with it for a few more years to see if the UV protection holds its color. Instructions are not included so it is impossible to know which screws/bolts are intended to be used in which locations. I ended up buying more from Lowe's and trying to use the OEM directions. (OEM has two screws on the bottom that aren't wide enough for the 2nd hole.) I will most likely not buy them again but will go with the OEM.