Features: Easy to carry: The screws are packed in a sturdy carrying case for easy carrying and storage. Durable: These screws are made of high quality 304 stainless steel with high strength and good corrosion resistance. Function: As a fixed component in confined areas, industrial and construction fasteners. Wide application: can be used in home, office appliances, machinery, furniture, maintenance, invention and other fields. Multiple types of nuts: can meet your different item maintenance needs. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Material: 304 Stianless Size:17.6cm * 10.2cm * 2.3cm Package List: 1 Box*Steel Screw HeadsM3X0.5 M4X0.7 M5X0.8