 long lag bolt designed just for gutters and this way once you attach it it won't fall out and you want to make sure that they slope properly because you're going to put these in sections you're going to have to sort of plot out that slope maybe by running a chalk line and snapping a line down the fascia to make sure you maintain the proper angle of these pieces as they get assembled and then where they join together you're going to have to use a sealant on all of those seams to make sure they don't leak so you definitely can do it yourself it will save you some money