Material: the hexagon socket nut is made of color galvanized carbon steel, high hardness, not easy to deform, corrosion resistance, good fastening effect, and can be screwed easily. Features: The nut has high strength and impact resistance, and is more stable when connecting with wooden furniture, effectively prevents loosening, and can be firmly fixed for a long time. Overall size : 8 different screw sizes, M4*10mm*80, M5*10mm*60, M6*10mm*30, M6*15mm 20, M6*17mm*20, M6*20mm*9, M8*20mm*5, M8*25mm * 6 (inner diameter * length * quantity). Safety tips: drop wood glue into the hole (on the side wall), insert and rotate the nut several times, drop the glue on the thread of the nut, then fully tighten the nut so that it is flush with the wood. Flat and as dry as possible. Scope: Suitable for soft wood such as pine, plywood, fiberboard etc. (a small hole should be drilled before installation). The number of shipments: 80 pieces 4*10mm 60 pieces 5*10mm 30 pieces 6*10mm 20 pieces 6*15mm 20 pieces 6*17mm 9 pieces 6*20mm