【Grade 12.9 Carbon Steel】Made of Grade 12.9 Carbon Steel, it has high hardness and durability.
【Oxidized Surface Treatment】Oxidized surface treatment provides anti-rust protection for these fixing screws, which are not easy to fall off and can be used for a long time.
【Easy to Operate】You can use a hex wrench to easily drive our multi-purpose hex head set screws, easy to operate and improve your work efficiency.
【8 Sizes】There are a total of 200 screws, 8 common sizes of screws, you can choose the right size to use according to your needs.
【Wide Application】It is suitable for household and office appliances, communication equipment, ship assembly and other machinery industries, and is widely used.