Made for the reverse bead half round gutter, these gutter hangers hook into the front bead of the gutter and clip over the back. The extended clip on the backside is made to rest against the fascia board and helps keep the gutter from tipping away from the house.
It's recommended that a t-strap or gutter wedge is used with these hangers for strength, half round gutters are round and must have something to support the front of gutter, or brace the back.