Description Including 880pcs in 4 sizes to meet your different needs, this fine quality stainless steel kit is quite rust-resistant and durable for a long service life. It is applicable to all kinds of assembly, maintenance and repair of precision machinery, electronic products and household appliances, ideal for all kinds of workers and repairers. Features: - Reliable Quality: Made of 304 stainless steel, this screw combination kit Features high hardness, rust-resistant and wear-resistant for long time using. - 880Pcs Set: Screw nuts, washers and countersunk head hex screws in different sizes. - 4 Different Sizes: Including M2, M3, M4, M5, meeting different needs. - Compact Storage Case: All components can be stored in this case, space-saving and easy to carry. - Wide Application: Applicable to all kinds of assembly, maintenance and repair of precision machinery, instruments, electronic products, communication products, locks, household appliances, lighting, furniture and toys, ideal for all kinds of workers and repairers. Specifications: Material: Stainless Steel Color: Silver Thread Tolerance: 4H Screw Diameter: 3mm Screw Length: 100mm Package Size: Approx. 19 * 13 * 2.1cm / 7.48 * 5.12 * 0.83in Package Weight: Approx. 514g / 18.13 oz Packing List: 125 * M2 Screw Nut 85 * M3 Screw Nut 45 * M4 Screw Nut 45 * M5 Screw Nut 125 * M2 Washer 85 * M3 Washer 45 * M4 Washer 45 * M5 Washer 10 * Countersunk Head Hexagonal Screw M5 * 8mm 10 * Countersunk Head Hexagonal Screw M5 * 12mm 10 * Countersunk Head Hexagonal Screw M5 * 16mm 10 * Countersunk Head Hexagonal Screw M5 * 20mm 10 * Countersunk Head Hexagonal Screw M4 * 8mm 10 * Countersunk Head Hexagonal Screw M4 * 12mm 10 * Countersunk Head Hexagonal Screw M4 * 16mm 10 * Countersunk Head Hexagonal Screw M4 * 20mm 20 * Countersunk Head Hexagonal Screw M3 * 8mm 20 * Countersunk Head Hexagonal Screw M3 * 12mm 20 * Countersunk Head Hexagonal Screw M3 * 16mm 20 * Countersunk Head Hexagonal Screw M3 * 20mm 30 * Countersunk Head Hexagonal Screw M2 * 8mm 30 * Countersunk Head Hexagonal Screw M2 * 12mm 30 * Countersunk Head Hexagonal Screw M2 * 16 mm 30 * Countersunk Head Hexagonal Screws M2 * 20 mm