MADE PROUDLY IN THE USA Product Description These solid copper nails are the type recommended for use with many major brands of tile and slate roofing – and are the most compatible nails for use with copper flashing.The full 3/8” head gives good bearing pressure on roofing and flashing material. Diamond point and smooth shank make driving easy. INSTALLATION: To prevent bending when hammering in, drill a 1/16" pilot hole for best results