• 625 pieces of self-locking nuts in 7 sizes: 35 X M3, 30 X M4, 25 X M5, 25 X M6, 10 X M8, 8 X M10, 5 X M12. • 8 sizes of lock nuts: 95 X M2, 95 X M2.5, 85 X M3, 70 X M3.5, 68 X M4, 28 X M5, 32 X M6, 14 X M8. • Nylon inserts for secure locking and deep threads to prevent loosening. • Made with 304 stainless steel and high-quality nylon, offering corrosion resistance and stability. • Packaged in plastic storage boxes, sorted and labeled. • Ideal for automobiles, engineering machinery, cabinets, furniture, engines, cars, and motorcycles.