The Twin Ring is designed to be used in sectional Class II matrix adaptation and can be used with any matrix. Features: - Made of two NiTi wires. - The structural design of the Twin Ring causes it to have excellent form memory. - It is guaranteed to retain its original shape without deformity, even after hundreds of uses. - The unique design allows the Twin Ring to adapt to a variety of tooth types and shapes. The round cross-section of the ring allows the Application of a strong, even tension that: - Assists in the separation of the teeth creates a strong seal with the matrix without collapsing the matrix into the cavity and doesn’t allow the composite to flow past the gingival margin which eliminates line angle overhangs.