Engineered to provide strength, stability, and natural contour as it creates a tight contact. Matrix bands snuggly wrap the tooth to form a natural, preshaped marginal ridge and a wide and tight interproximal contact. Active-Wedges feature a collapsing tip to allow for easy placement and a rigid internal spine to ensure active pressure is applied to the matrix band, preventing composite overhangs, even in deep restorations. Rings feature nonstick dual NiTi wires, allowing for more separation force, while being easier to place. Rings are angled to engage the tooth more firmly, helping to seal the vertical margins and prevent composite overhangs.