This product is a comprehensive assortment of 1380 hex bolts, nuts, and washers in sizes M2, M3, M4, and M5, all made of carbon steel. The hex shape and round head style make them versatile for a variety of industrial and commercial applications. Additionally, the set includes hex keys for easy tightening and loosening of the fasteners. Ideal for use in a range of businesses, offices, and industrial settings, this product offers convenience and reliability for fastening needs.