520pcs M3 M4 M5 M6 Kit Stainless Steel Hex Hex Body Socket Cable Bolts Screws With Assortment Nuts (520pcs Kit) Different Screw Sizes: M3 * 8, M3 * 12, M3 * 16, M3 * 20, M4 * 8, M4 * 12, M4 * 16, M4 * 20, M5 * 8, M5 * 12, M5 * 16, M5 * 20, M6 * 8, M6 * 12, M6 * 16, M6 * 20, to meet the different needs. It is a very essential manual tool for the family. With the nuts and washers M3, M4, M5 and M6, the installations are now more precise with an increase in the contact surface, which Reduces the pressure and protects parts and screws. The nuts and washers are arranged in a storage box, which allows you to easily find yourself in the series and avoid the loss in case of Need. They are anti-oxidizable and corrosive even at high temperature. The main use of the stainless steel hex screw is very frequent in electronics, for electrical appliances, chemicals, water, machines and equipment, furniture and many other areas. Hardware 304 High quality stainless steel. It has good maneuverability