【Premium Quality.】Made from high quality stainless steel. The heavy duty screw set represents good corrosion resistance in harsh environments such as high temperature, cold weather and high humidity areas. 【Metric standard.】 Our M3 M4 M5 screws and nuts M6 accord with the standard metric system, and the average error is less than 0.01mm, It has good workability, and the installations are more accurate. 【Comes with nuts and washers. 】Nuts and flat washers help widen contact space and reduce pressure to protect screws and parts, maximally meet various needs of professionals. 【Long-term storage and convenient.】Screws, nuts and washers are arranged in a durable and sturdy case, the case is divided into multiple tiles to store all types respectively, which makes it easy for you to find the series and avoid the loss. 【Wide application.】 The main use of stainless steel hex screw is widely used in electronics, electrical appliances, chemicals, water, machinery and equipment, furniture and