The words guarantee and custom are a bit misleading. Had some fitment issues, mainly following the contour of the factory protection trim. Directions read use factory screws; however for my pick up anyway, there was only 1 toward the bottom of each fender, not 2. The factory drill holes were there so all I had to do is buy some screws. Also used 1 1/4" for the front since the factory 1" didn't allow enough bite. Might add another screw to the back ones to improve sturdiness as well. So, they are on and look ok (should've got the stainless trim), but I won't be heartbroken when/if they wear out and need replaced.