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. Features: The nut has high strength and impact resistance, and is more stable when connecting with wooden furniture, effectively prevents loosening, and can be securely fixed for a long time. Overall size: 8 different sizes of screws, 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 , put glue on the thread of the nut, then tighten the nut completely so that it is flush with the wood. Flat and as dry as possible. Scope of application: Suitable for wood soft such as pine, plywood, fiberboard, etc. (a small hole must be drilled before installation).