• High-quality material: Made of stainless steel and nylon, our self-locking nuts are corrosion-resistant and durable for prolonged use. • Nylon insert: The nylon insert prevents the nuts from loosening due to vibrations, keeping them firmly in place. • Easy storage: Comes in a transparent storage box with individual compartments, allowing for clear organization and visibility. • Wide range of applications: Ideal for use with bolts, threaded rods, and Allen screws in folding beds, cabinets, machinery, and more. • Variety of sizes: Includes 200 pieces in total, with sizes M2, M3, M4, M5, M6, M8, M10, and M12, suitable for various needs. • Product dimensions: Width: 10 cm, Height: 2.2 cm, Length: 17 cm, Weight: 1 kg (approximately).