The FandWay 100Pcs Wafer Head Self-Tapping Screws, M4.2x13mm, made of carbon steel sheet metal, offer precision and durability for your DIY projects. These innovative screws have a modified truss head design, enabling a quick and secure seating of the screw into the wood surface. The wafer head ensures better alignment and a reduced risk of stripping the screw or damaging the wood. Ideal for aluminum woodwork and plastics, these screws come in handy when you need a reliable and affordable solution for securing and fastening components together.