Historic horse tethering rings in Portland, OR DBI SALA, For Hand Tools, Split Ring, Tether Ring 447Y15 1500026 CRT Tether Ring Prostar Equipment Leasing The Prostar CRT Tether Ring is designed to keep Casing Running Tools Tether Ring, Large Quick Reach. 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.