900Pcs M4 Nuts And Bolts Assortment Kit 4Mm-45Mm, Upgraded Zinc Plated 12.9 ? [Cost-effective Quantity 900 Pieces, 4mm 6mm 8mm 10mm 12mm 14mm 16mm 20mm 25mm 30mm 35mm 40mm 45mm M4 Screws with Nuts Meet Various Demands] Nice metric screw assortment?300 x M4 Bolts are in 13 lengths. 300 x M4 Nuts; 300 x M4 Washers; 1 x hex key, 1 x transparent screws and nuts organizer. ? [Customize 13 Lengths More Choices, Available in Short Lengths of 4mm and Long Lengths of Up to 45mm] Different length of M4 metric bolt assortment total 900pcs. From the customer's point of view, combined with the actual situation, K Kwokker specially match 13 lengths of m4 screw kit. RC lovers dream! Must have for modifications and tinkerers. ? [Upgraded Zinc Plated Screw Set, More Clean and Tidy, Practical Gifts for Family and Friends] Upgraded zinc electroplated version, extended rust prevention time, more elaborate production process, no need to add anti-rust oil, cleaner and tidier. Whether for your own use, or as a gift for others, it is a very good choice. Each screw is packed separately in a bag. Storage: Assorted screws all are stored in one storage bin box, easy and convenient for storing and carrying, in case of missing. ? [High Quality 12.9 Grade Alloy Steel + More Than 20 Years of Experience in Fastener Tool Production] Nice Screws assortment, durable nuts and bolts. Extraordinary Technology Professional Durability. Machine screw assortment kit accord with standardized metric system, whether for your own use or as a gift to others, it is a good choice. ? [K Kwokker Screws Assortment Kit Can Be Widely Used] in all kinds of precision machinery, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc.