The Tolsen 54194 is a self-drilling screw designed for securing metal, plastic, or composite panels, making it a practical choice for installing roofs, facades, and various metal structures. These 5.5x50mm fasteners feature a hexagonal head and a zinc coating that helps protect the metal from corrosion over time. Because they have a self-drilling tip, you can drive them directly into the material without needing to pre-drill holes, which speeds up your workflow. Each screw includes an integrated rubber gasket to ensure a tight seal against moisture, and they come in a colored box containing 250 pieces for larger projects.