The Tolsen 54181 is a self-drilling screw designed for securing metal or aluminum panels, making it a practical choice for installing roofs and facades. These steel fasteners feature a zinc-plated finish that helps protect the material from corrosion, while the countersunk head allows them to sit flush with the surface for a neat finish. Each screw has a diameter of 4.8 mm and a length of 32 mm, utilizing a Phillips drive for a secure grip during installation. Because they are self-drilling, you can skip the pre-drilling step, which significantly speeds up your workflow when handling large surface areas. This pack contains 500 pieces, providing a substantial supply for larger construction projects.