The product is a set of 840 M4 stainless steel hex head bolts, nuts, and washers. These fasteners are designed with a hex-key drive style for easy installation and a hex head style for a secure connection. The stainless steel material ensures durability and resistance to corrosion, making them ideal for various industrial, business, and office applications. The metric system of measurement ensures precision and compatibility with a wide range of projects. Ideal for professionals and DIY enthusiasts alike, this product provides a comprehensive solution for fastening needs.