• Material: high-quality stainless steel, anticorrosive and rustproof. • Set of hex socket head screws and nuts, easy to insert. • Includes 284 pieces: M6 x 8 mm, 10 mm, 12 mm, 16 mm, 20 mm, 25 mm, 30 mm, 35 mm, flat and lock washers M6, hex nuts. • Used in precision machinery, household appliances, communication products, locks, lamps, etc. • Storage box with size labels for easy identification and transport.