D-Ring is great for making paracord key rings, dog collars, leashes, etc. These D-Rings are non-welded, nickel plated metal and are available in several sizes: 3/8 in (10mm); 1/2 in (13mm); 5/8 in (16mm); 3/4 in (20mm); 1 in (25mm); 1-1/4 in (33mm); 1-1/2 in (38mm); 2 in (53mm).