Material: The hexagon socket nut is made of color galvanized carbon steel, high hardness, not easy to deform, corrosion resistance, good fixing effect, and can be easily screwed on.Features: The nut has high strength and impact resistance, and is more stable when connecting with wooden furniture, effectively prevent loosening, and can be securely 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 in the hole (on the side wall), insert and rotate the nut several times, drop 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 of application: Suitable for soft wood such as pine, plywood, fiberboard etc. (a small hole must be drilled before installation).