<prompt> In the Beggs fixed appliance, a bracket having:Horizontal slot is used with round wireHorizontal slot is used with rectangular wireVertical slot is used with round wireVertical slot is used with rectangular wire  <response>: The bracket used in Begg fixed appliance mechanotherapy is modified ribbon arch bracket, with vertical slot and opening of this bracket is in occlusalincisal direction. Dr. Begg proposed use of special type of round wire called Australian wire in his technique. 