Product name: wing butterfly screw Material: Sustainable 304 stainless steel. Compared to normal stainless steel, it is safer, more durable, non -toxic and corrosion resistant. It is very hard and is not easy to distort. It can be used in an external environment wet. Functionality: Special design of the wing, increases the lateral support surface and makes it easier to fix, can be used repeatedly. Use: turn the screw by hand without any other tool, easy to install. Applications: widely used in machines and equipment, electronic equipment, communication equipment, hardware lighting, bridges construction, furniture decoration that requires insulation, a Disassembly and frequent maintenance.