These Tolsen self-drilling metal screws are designed to simplify your fastening tasks by eliminating the need for pre-drilling holes in metal surfaces. Each pack contains 500 pieces with a zinc-plated finish that helps protect the hardware from corrosion over time. Featuring a Phillips cross-head for a secure grip during installation, these screws come in a 4.8x38mm size. This specific length makes them a practical choice for metal construction and repair projects where a deeper reach is required based on the thickness of the material you are working with.