• Includes 340 star washers in 7 different sizes: M3, M4, M5, M6, M8, M10, and M12. • Made with high-quality 65 manganese and galvanized surface, resistant to rust and corrosion. • Transparent storage box with labeled compartments for easy access and organization. • Ideal for quick and permanent assemblies on steel shafts, non-ferrous metals, and plastic materials. • Wide uses in automotive, medicine, home, toys, construction, electricity, agriculture, livestock, air conditioning equipment, crafts, appliances, marine assembly, brake systems, office equipment, computers, and architecture. • Product dimensions: 15 cm wide, 2.4 cm high, and 18 cm long.