[Upgraded Zinc Plated Screw Set]: All screws without adding any anti-rust oil, featuring upgraded black zinc plated, extend the rust-proof time, cleaner and tidier. It is an Perfect choice whether for your own use, or as a family or friends. [Nice Storage Box]: The bolts and nuts kit are packed in a reinforced box with separate compartments and sturdy latches, clean and neat, keep everything well organized, easy to store and carry, clear label sheets are pasted on both the inner and outer lids, allowing you to quickly see which sizes you need to use and refill. [Wide Applications]: This metric bolt assortment can be widely used in all kinds of precision machinery, 3D printers, electronics, , toys, etc Tips: The product may be updated constantly, the label words on the product are random, Cannot be chosen the specific words. The actual product may have slight differences or color differences.please don't mind. And take a consideration before place the order if you have request for color or appearance. About this item [Well-made Metric Bolts and Nuts Assortment] : 100% made of high quality alloy steel, high strength, superior rust resistance and excellent oxidation resistance, perfect for all weather use. Metric screw assortment conforms to the standardized metric system, the average error is less than 0.01 mm. [1060PC Standard Size] in total, meet all demands. wrenches customized for each size are provided in the kit to make the screws easier to use. Material: steel colour: black Package Contents: 1 x Screw Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.