Historic horse tethering rings in Portland, OR Web Tool Tether Attachment Ergodyne Securing Rig Floor Safety with ProTorques Patented Tether Ring 109 Tether Ring Stock Photos Free & Royalty Free Stock Photos from The Prostar CRT Tether Ring is designed to keep Casing Running Tools. A study in contrast and connection. The Tether Ring features a bold, etched 925 sterling silver form crowned with a suspended lab grown ruby charm. The rich red stone dances against the weight of the squared bandstriking a balance between permanence and motion. A sculptural, symbolic piece that speaks to emotional gravity and the beauty of restraint.