The Tolsen 54152 is a set of truss head screws with integrated washers, designed specifically for securing thin sheet metal, steel, and aluminum surfaces. Each screw features a 4.2 mm diameter and a length of 19 mm, utilizing a Phillips drive for a reliable grip during installation. To prevent corrosion and ensure durability in various environments, these fasteners are finished with zinc plating. This pack of 500 pieces comes in a colored box, making it a practical choice for professionals or DIY enthusiasts who need a consistent supply of sturdy fasteners for metalwork projects.