Abstract: A removable attachment for a tube bender or for the tube to be bent for predetermining a selected bend angle to which the tube is to be bent prior to the bending operation. In a first embodiment of the device, an audio and/or visual indicator indicates when the desired bend angle is achieved. In a second embodiment of the device, an audio indicator indicates during the bending operation when the desired bend angle is being approached and a second audio/visual indication indicates when the desired bend angle is achieved. In both embodiments an electrical continuity tester is provided.