Metal D-Rings are vital to many securing methods out there. If you've ever hauled lumber, tied up a boat, or used a heavy-duty backpack, you've probably relied on some combination of nylon webbing and a series of metal D-rings to see you through. Those examples are just a few of the places these hardware items show up. There are tons of uses for metal D-rings you haven't even thought of yet.
Goldstartool.com offers metal D-rings in multiple sizes and strengths.
3/4" Thickness 0.078 inch
2 mm 1" Thickness 0.090 inch
2.3 mm 1-1/2" Thickness 1/8 inch
3 mm 2" Thickness 5/32 inch