Each nut features two wing style pieces that allow you to easily adjust and tighten with your hands or with tools. 20Pcs Zinc Plated Wingnuts M3 M4 M5 M6 M8 Hand Tighten Ear uxcell 5/16-18 Wing Nuts, Carbon Steel Zinc Plated Fasteners Parts Hurrican Screws Hand Twist Tighten Ear Butterfly Nut, 6pcs: : Industrial & Scientific About this item [SIZE] - 5/16-18. [MATERIAL] - Made of carbon steel, surface is zinc-plated for good rust resistance.. [ADVANTAGE] - It is used in places where frequent adjustment or disassembly of fastener connections is required... These wing nuts can be used to help make fast, easy adjustments without fear of stress, damage or abrasion taking place. Constructed from carbon steel, surface is zinc-plated for good rust resistance. Each nut features two wing style pieces that allow you to easily adjust and tighten with your hands or with tools. Constructed from carbon steel, surface is zinc-plated for good rust resistance No tools are required to install the product, just turn your hand to complete. Wing Nut Handy s, Galvanized Carbon Steel Zinc Plated Fasteners Parts Easy Hand Twist Tighten For Furniture Decoration 25pcs Wing Nut Driver [APPLICATION] - Machinery and equipment, electronic equipment, communications equipment, hardware lighting, building bridges, furniture decoration, etc.