HIGH QUALITY：These screws are made of high-hardness stainless steel and are suitable for steel processing and metal processing. ADVANTAGE:These self-drilling screws have sharp bore tails that do not require additional machining. SAVE TIME:They can drill, tap and lock materials at the same time, which is safe to operate and saves construction time. WIDELY APPLICATION: These self-drilling screws are mainly used for fixing steel steel tiles, or for simple construction of thin plates., Weight: 0.239752709925 Pounds, Manufacturer: Hilitand