• Manufactured from high-quality steel, these self-drilling screws are durable and corrosion-resistant thanks to their galvanized coating. • Easy to install, they do not require pre-drilling, and it is recommended to use a suitable wrench to avoid damage. • They include a rubber washer that seals and protects against water ingress, ensuring a firm connection and prolonging the product's lifespan. • Ideal for fastening sheets, gutters, sheet metal roofs, and metal structures, these screws are highly resistant to mechanical damage. • The package contains 120 hexagonal screws of 6.3 x 25 mm and 2 M10 hex keys, made of chrome vanadium steel for greater durability. • They are not suitable for use with aluminum sheets due to their galvanized steel composition.