【HIGH QUALITY】--- Made of high quality 10.9 grade alloy steel, which features is strength and offers good corrosion resistance in bad environment like high temperature, cold weather, and high humidity areas.

【SIZES】--- M2 M3 M4 M5 Hex Button Head Cap Bolts Screws Nuts Washers. According with standardized metric system. And the average error is less than 0.01mm. The Nuts and flat washers expand the contact area and reduce the pressure in order to protect the screws and parts. Compact and force uniform screw thread is not easy to out of shape and slid in the process of rolling and installation.

【PACKAGE】--- All of Screws and Nuts are packed in a durable and sturdy Box to efficiently bear the weight of the whole package. In order to avoid the screws being scattered or lost during use, we specially package for each different type of screws for your convenience and storage.

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