What you will need:
Gutter Bird Spikes are very easy to install. Simply position the spike strip on the inside of the gutter lip and bend the clip around the lip with a pair of pliers. The clips have pre-drilled holes to allow for the option of using self taping screws or rivets to hold the spikes in place.
The vertical row of spikes should be pointing upwards just inside the lip and the angled row of spikes should be pointing back across the gutter towards the roof.
The vertical row of spikes are designed to stop birds from perching on the lip of the gutter, while the angled row of spikes are designed to block birds from gaining access to the gutter and either nesting in the gutter or getting up under the roofing. See images below showing installation technique.