These D-rings have an inner width of 43mm and a thickness of 3mm. They are welded, meaning they do not have a split in the middle. Made from strong, solid metal, these D-rings are reliable, durable, and capable of bearing heavy loads. They are also resistant to sudden impacts, making them ideal for a variety of applications such as harnesses, dog collars, leashes, webbing straps, luggage straps, and tie-down anchor rings.