DBI/SALA 1/4" X 2" X 4-1/4" Cadmium-Plated D-Ring With Stainless Steel Anchorage Plate can be bolted or welded to any construction with two 1/2" diameter attachment holes to PRO ide tremendous durability. It complies with all relevant industry standards such as OSHA, ANSI and the stringent ANSI Z359.