Materials: screws and nuts are made of high quality 304 stainless steel (raw material). These qualities guarantee wear resistance making these screws and nuts practically indestructible. They have a superior resistance to rust and the excellent resistance to oxidation, which can ensure a long period of use and prolong the lifespan of screws and nuts. Large application: Assortment kit of hexagonal head screws and M2.5 nuts for a wide range of use and goal for professionals, amateurs, owners, repairers, other DIY projects and DIY enthusiasts. The kit will save you from the disorder. Ideal for use in confined areas as fixing elements, industrial and construction fixings. metric standard: our M2.5 screws and nuts agree with the standardized metric system. And the average error is less than 0.01 mm. The thread is very clear, clean and precise without burrs. Compact and uniform force thread is not easy to deform and slides in the lamination and installation process. The deep and clear