The Tolsen 54120 is a self-tapping screw designed for working with metal sheets, profiles, and aluminum parts. These fasteners feature a Phillips head and a zinc-plated galvanized finish that helps protect the metal from corrosion over time. Each screw has a diameter of 4.2 mm and a length of 19 mm, allowing you to secure components without the need for pre-drilling, which speeds up your assembly process. This set comes in a colored box containing 500 pieces, providing a generous supply for larger projects or ongoing maintenance tasks.