These D rings are very nice. The opening is 3/4", overall measurement is 1" x 3/4". The metal itself is 3.2 mm thick. These rings are not welded, but have a tight closure If you do need to open them, you can do so with a pair of pliers (wrap the pliers in masking tape to avoid scratching the finish).
On-Line Bulk Wholesale Ordering Coming Soon
Other Purchases May Be Made In Our Etsy Store
6 Piece Artisan Pack
18 Piece Artisan Pack