Order this PRO-FIT 1-1/2 in. Electro-Galvanized Metal Roofing Nail for delivery. Coating: electro galvanized for exterior use. Code: Aligns to ASTM F1667, as applicable. Applications: designed to attach asphalt shingles, insulation board and felt to wood substrates, these can also be used with vinyl siding. Head style: flat head offers a large striking surface for easy drive connection and holding power. Shank style: heavy and smooth shank offers great holding power and are fast and easy to drive. Point type: diamond point starts fast and drives easily. Length: nails are 1-1/2 in.