The Tolsen 54164 is a self-drilling screw designed for the assembly of metal components, profiles, and thin sheet structures. Its sharp drill tip allows you to secure parts without the need for pre-drilling, which simplifies the installation process. Each screw features a truss head and a Phillips drive, measuring 4.2 mm in diameter and 25 mm in length. Finished with a zinc plating, these screws provide corrosion protection that makes them suitable for both interior and exterior applications in environments with moderate humidity. This pack of 500 pieces is a practical choice for anyone working on metal framing or sheet metal projects who needs a reliable fastening solution.