The Copper Clout Nails 3.35 x 40mm (1kg/Pack) are a quality choice for roofing and other construction projects. Manufactured from copper, these nails are resistant to rust and corrosion, ensuring durability in a variety of environmental conditions. Their large flat head provides a solid hold while the sharp point allows for easy penetration into materials. With a size of 3.35 x 40mm, theyre ideal for securing roof shingles, tiles, or slates. Each pack weighs 1kg, offering a generous quantity for substantial projects.