Instructions left a lot to be desired, could have labeled the parts that attach to the vehicle with drivers or passengers side front, middle, or rear. Would have saved about 45 minutes of install time. There was no drilling required and once you figure out how to feed the brackets into the inside of the body of the truck it is not too hard to do the rest first one took 30 minutes 2nd 3rd and 4th about 5 minutes. The holes in the front on my trucks body had to have to threads retaped that took some time finding my tap set but overall a pretty good setup and look great on the truck.. My wife likes the ease of access they afford.