Rings engineered using dual nickel titanium wires that provide excellent balanced separation force on both mesial and distal surfaces. Ni-Ti wires are resistant to fatigue, for consistent separation force throughout the life of the ring. 4 independent interproximal separating prongs that adapt better to the tooth morphology and exhibit the ideal engagement angle to ensure they are seated firmly and securely, resisting dislodgement. Less hand strain is required to open the rings, yet the resulting separation force on the teeth is stronger. Autoclavable and resistant to composite and adhesive sticking.