We carry d-rings in multiple sizes and capacities to suit your needs. We have small light-duty d-rings (down to 1/4") that are great for use in small utility trailers. Specifically, check out the DR-025 and DR-5M. But most of our users are the industrial type, which means bigger is often better. We sell the 1/2" size of d-ring most commonly, with the DR-050 Bolt-on model being our best-seller. We carry larger sizes too, up to 1" in both standard and bent styles. And for overhead lifting, check out the Crosby S-265 Pivot Links. They are made from forged steel, Quenched and Tempered, in sizes up to 12 metric tons.