You can purchase rebar rings through several channels depending on the scale of your project: 4 x 12" RingPack – Pre-Packaged Rebar Rings
Buying rebar rings—often technically called , ties , or circular stirrups —is a standard step for reinforcing circular columns, piers, and footings. These pre-bent steel loops provide the necessary lateral support to prevent buckling in vertical structures and confine concrete for maximum strength. Where to Buy Rebar Rings