Specification:Screws Type: Hex Socket Button Head ScrewDrive Type: Hex SocketSize: M2 M2.5 M4 M5 M6 M8 M10Material: Alloy SteelFAQ:If you are a retailer and want make your own business, we could send the goods to your customersdirectly and won't leave information about us if you'd like to.2. What should I do if I don't receive my item?you. We are honest seller, so don't worry.3. If the products have problems how to do it?Specification For example:M2*3=Thread diameter 2mm * length 3mm