End Caps are a necessary part to the Raindrop Gutter Guard System. Wherever there is a gutter end cap, there should also be an Raindrop® End Cap. The Raindrop® End Caps close off the gutter & gutter protection system from blowing debris and other potential dangers like nesting birds, bugs, and squirrels. The End Cap provides a clean termination for the entire gutter system. Interchangeable from right to left sides. Fast and easy install to any angle.