Metro Staples is the manufacturer and supplier of Hog Ringer Round Fasteners. Metro Staples is an ISO 9001-2000 certified company. Hog Ringer Round Fasteners are C-shaped metal wires [C-Ring] to fasten wire to wire, spring to border wire and wire to fabric and plastic. The C-ringer Hog Ringer Round Fasteners is mainly used for binding, connecting and fastening quickly and securely, such as in the assembly of car seats and mattresses as well as binding artificial flowers.