The Insert Nuts are made of zinc alloy, resistant and durable, antioxidant and anticorrosive, they can be used for a long time. Easy to install and with good stability, it has a good effect on furniture combination, suitable for soft woods like pine, plywood, fiberboards, etc. - Material: zinc alloy - Quantity: 130 pieces in total - Package contents: - M4 * 10 mm threaded insert --- 30 pieces - M5 * 10 mm threaded insert --- 30 pieces - M6 * 10 mm threaded insert --- 20 pieces - M6 * 15 mm threaded insert --- 20 pieces - M8 * 15 mm threaded insert --- 10 pieces - M8 * 20 mm threaded insert --- 10 pieces - M10 * 25 mm threaded insert --- 10 pieces - Includes transparent storage box - Note: The products contain small parts, do not allow children to play with them to avoid accidental swallowing. To facilitate installation, make a proper size hole before installation. Enlarge the hole when the material is harder.