[High Quality Material]High Quality Stainless Steel Hex Socket Button Head Bolts Screws Nuts. The socket cap screws are made from high quality 304 stainless steel known for its dependable and rigid strength as well as its corrosion resistant quality. This type of steel is able to withstand drastic weather and temperature changes including placement within extremely humid areas. These qualities ensure hard-wearing making these screws and nuts virtually indestructible.

[Better Quantity Assortment] 500pcs Screws and Nuts included(M3, M4, M5). All of screws nuts will be packed in a sturdy convenient case, can be use for a storage box, is organized to you. The kit will save you from the mess. The kit has fifteen different sizes, which can meet the maximum of requirement for you.

[Safety and Eco-Friendly]M3 M4 M5 screws and nuts adopt high quality 304 Stainless Steel material, which is environmental protection and mercury-free & toxic-free. In the process of using, there are no toxic substances releasing, which will ensure your safety.

[Wide Application]This kit can be widely used in all kinds of precision machinery industry, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc.