Solid Brass Round O rings - China Qingdao Yanfei Rigging Supplier Please contact us if any interest. We will suplly them form stock. The Brass Snaps Hooks found in this section are made in the sand cast method then polished to a high luster. These Solid Brass Snaps and Harness Rings are widely used in the marine and harness industry because they hold up to the elements and give a rich appearance.