1\nM2 M3 M4 M5 screws and nuts set includes: 1180 pieces M2 M3 M4 M5 screws in different sizes and specifications, with matching nuts and washers to meet the needs of different people. Nuts and washers extend the contact surface and reduce pressure to protect screws and parts.\n\u3010Material\u3011: The small M2 M3 M4 M5 screw set carbon steel is made of 10.9 grade carbon steel, which is much harder than stainless steel. Black surface treatment, corrosion resistant, acid and alkali resistant and high hardness.\nEasy to use: the nut can extend the contact surface, reduce pressure and protect the screw and parts. The hexagonal steel thread is even, smooth and firm, does not easily deform and slide during the working process and fits perfectly with the nut\nHex screws package: all screws and nuts are packed in durable and sturdy plastic boxes to prevent screws from being scattered or lost during use. The screws come with 4 piece wrenches also known as Allen key that perfectly match our s