D-rings are a type of hardware commonly used in various applications, particularly in sewing, crafting, and industrial settings. They are named for their shape, which resembles the letter "D." D-rings are typically made of metal, such as steel or brass, and come in various sizes and finishes.

These rings have a flat base with a straight or curved side and a rounded side, forming the "D" shape. They often have a small opening or slot on one end for attaching straps, webbing, or other materials securely. D-rings are frequently used as attachment points for straps on bags, belts, harnesses, and other items where a strong connection is needed.

In addition to their functional uses, D-rings are also popular decorative elements in fashion, especially in accessories like handbags, belts, and jewelry. They provide both practical functionality and aesthetic appeal in a wide range of applications.