Get this Amerimax Home Products C6 Aluminum Drip Edge Flashing – Mill Finish for delivery. Designed to be used along the gutter line of the roof’s edge.. Rust-free aluminum construction for durability. Install by nailing under shingles. 3 in. nailing edge with a 3 in. drop. Use as starter strip for a true edge to align shingles. For new construction and reroofs on both residential and commercial buildings. Baked-on white enamel finish for low maintenance. Guides rainwater away from your fascia and prevents runoff damage.