Review on Bushwacker Ultimate BedRail Caps - DiamondBack W/ Stake Holes 2-Piece Set, Black, Smooth Finish 49503 Fits 2001-2006 Chevrolet/GMC Silverado/Sierra 1500/2500HD/3500 (Excludes Flareside) 6.5' Bed by Kevin Mitchell

I bought these to cover my bed rails to help protect them. I have my back rack on top of it which helps hold it into place. However if you do install a back rack the plastic interferes with the nut for it. Okay product, the holes for the cargo mounts don't line up so you have to cut your own. Kind of sucks especially since The passenger side lined up perfectly but the driver side did not these are definitely not symmetrical. Yes they were installed nice and tight and they are level with each other. Not the quality I'm used to with bushwacker.