Each hoist ring is heat treated and 100% magnetic particle inspected as well as 200% proof load tested. In addition they are tested from independent labora­tories and each hoist rings has its own serial number for better trace­ability for safety inspec­tions. The areas where hoist rings can be used is wide and includes all indus­tries where machines, tools, dies, containers and more have to be lifted for production, mounting, or inspection.