• Complete kit of 180 metric rivet nuts in 7 different sizes for various applications. • Includes 40 pieces M3, 40 pieces M4, 35 pieces M5, 30 pieces M6, 20 pieces M8, 10 pieces M10, and 5 pieces M12. • Manufactured from high-quality carbon steel with a black galvanized finish for superior corrosion and rust resistance. • Flat head design with a knurled body that facilitates installation and ensures a strong connection. • Suitable for use in sheet metal, steel, aluminum, plastic, fiberglass, and other heavy materials. • Presented in a transparent and organized storage box with labeled compartments for each size. • Ideal for automotive, furniture, decoration, electrical industry, and general repair applications.