This durable dee ring is composed of zinc-plated steel. The heavy-duty D ring has an inner diameter of 1.5 inches. Use the welded D ring as a boat top fitting, shade sail connector, fabric strap fastener, carabiner, or tie-down anchor to secure cargo. The D-ring fastener can be used with other metal fittings for a variety of connecting and anchoring purposes. Save by buying metal D rings in bulk.