[Good storage and classification] All these screws are packed in a sturdy and easy-to-use plastic storage box, which is convenient and easy to arrange. [Oil-free rust prevention] These black zinc-plated smooth screws are oil-free and not stain your hands or DIY items, and their rust prevention performance is other oil-coated screws. [Simple and firm operation] The hexagon socket head screw can be directly screwed into the nut by hand without a wrench, and it is not easy to break., Manufacturer: PokFhgur