This is the only hanger system we have for double bead half round gutters. A threaded rod or a bus bar hanger is also needed to fasten this gutter to the roof deck. The hanger simply slides over both beads of the half round gutter. A pair of pliars can be used to clamp the hanger down on the bead of the half round gutter. The threaded rod (sold separately) needs to be bent to the pitch of the roof. The threaded end of the rod goes in the whole that is in the center of the double bead hanger and is secured with the nuts. The other end gets nailed to the roof sheathing.