It is an orthodontic accessory which permits complete freedom in positioning of the anchor points. It is used in fixed orthodontic therapy to receive arch wires of the diameters - .021 inches to .025 inches. Coupled to the main arch allows the installation of segmented arches, cantilever, handles and others. Also assists in closing spaces, uprighting of molars, intrusion of anterior teeth, loss of anchorage and others clinical situations.