?Superior Rust-Proof Performance?: Unlike ordinary blackened screws, our fasteners provide reliable rust-proof performance, making them ideal for both indoor and outdoor use. ?Clean and Easy-to-Handle?: Our screws are not greasy, making them easy to handle and leaving less mess in your work area. ?Versatile and Economical?: This set includes everything you need, with 860 PCS screws, nuts, and washers suitable for various DIY projects, making it a cost-effective solution for your fastener needs. ?Multi-Purpose Applications?: This set is suitable for using in various DIY projects such as 3D printing, TV and projector installation, motorcycle bike repair, furniture repair, and more, making it a perfect addition to any home or workshop.Keep a set of commonly used Kadrick screw sets on hand to make you convenient. Specifications: Pitch:The distances between adjacent threads of these metric M3 M4 M5 M6 screws are 0.5MM/0.7MM/0.8MM/1MM. Material: 12.9 grade alloy steel Screw Type: Hex socket head cap screw Package Included: M3 X6 mm 30pcs M4 X 8 mm 20pcs M5X 8 mm 15pcs M6 X 8 mm 10pcs M3 X 8 mm 30pcs M4 X 12 mm 20pcs M5 X 12mm 15pcs M6 X 12mm 10pcs M3 X 12mm 30pcs M4 X 16mm 15pcs M5 X 16mm 10pcs M6 X 20 mm 8pcs M3 X 16mm 30pcs M4 X 20mm 15pcs M5 X 20mm 10pcs M6 X 30 mm 8pcs M3 Washers 130pcs M4 Washers 80pcs M5 Washers 60pcs M6 Washers 38pcs M3 Nuts 120pcs M4 Nuts 70pcs M5 Nuts 50pcs M6 Nuts 36pcs Total:860 pcs M3 M4 M5 M6 12.9 grade alloy steel hex socket head cap screws nuts and washers with 4pcs allen wrenches (free), suitable for small DIY projects such as 3D printing and RC cars DIY,precision machinery industry, classified instruments, instruments,electronic products, household appliances, communication products, locks, lamps, lights, toys, etc. High quality alloy steel:12.9 grade alloy steel with superior rust resistance ensures long lasting results, corrosion resistance, anti-aging, good toughness. Well packed: We use a small plastic box with clear classification to place these small screws. To prevent screw confusion, we also prepare another outer packaging to ensure that the products are not damaged during transportation. Note: Small Parts, Keep Away From Children Under 5 Years Old.