Abstract: An orthodontic appliance for attachment to an archwire having a rectangular cross section. The appliance includes a body having a base portion from which a pair of jaws extend. Each jaw a slot for receiving the archwire. A pair of opposing surfaces of the jaws contact the archwire along two edges and maintain a grip on the archwire during treatment. The grip is maintained on the archwire by residual elastic strain from an interference fit between the archwire and the slot. The appliance is not plasticly deformed. Each of the pair of opposing surfaces includes a concave portion to contact the archwire only at the two edges. The base portion includes a pedestal portion between the opposing surfaces. The pedestal portion has a flat that contacts a side of the archwire. Contact on the two edges and one side provides a triangular grip on the archwire.