The product is a 1lb box of 3/8 x 1 1/4 round head solid steel plain finish rivets from Hanson Rivet & Supply Co. These rivets are made of durable steel and feature a plain finish for a sleek appearance. They are designed for various industrial and fastening applications, providing a secure and reliable connection for a range of materials. The round head style ensures a smooth and flush finish on the material being fastened, making them a versatile and essential component for many projects.