Abstract: A U-shaped fixture for supporting a wire hanger has an arm portion that is sufficiently narrow to render it preferentially collapsible under nail-driving force, thereby to maintain the open condition of its arcuate back portion. The reduced dimensions of the arm portion, and/or of a transition portion between the arm portion and the back portion, also contribute to the free multidirectional swiveling of an attached hanger.

Abstract: An oscillatory handpiece for a tool bit includes a housing having therewith fluid driven turbine rotor having an eccentric connection to an oscillatable rod which is effectively supported only at the point of its eccentric connection. The handpiece also includes means in the housing along the length of the rod which limits the amount of its oscillation and prevents its rotation. A liquid supply tube is disposed within the rod and supplies liquid to the tool bit which is removably engageable at the front end of the oscillatable rod. Moreover, by control of the oscillation limiting means and selection of materials and dimensions for the rod, harmonic vibrations may be used to augment the eccentrically generated oscillation and thus enhance the motion of the tool bit.