Light for manual rotary tool

In combination with a manual rotary hand tool having a shaft of an electrically conductive material with a handle at a first end of the shaft and a workpiece-engaging adaptation at a second end of the shaft, an improved device for illuminating the workpiece-engaging adaptation comprising:

• a body having a central aperture therethrough, the central aperture having an inner diameter of sufficient size to slide freely on the shaft;
• a pair of means for frictionally securing the body to the shaft at a selected point along the length thereof to prevent longitudinal movement therealong, the pair of means located along the central aperture;
• at least one light source disposed in the body so as to direct the light provided thereby at the workpiece-engaging adaptation;
• an energy source for each at least one light source, said energy source disposed in the body and communicated to the at least one light source to cause illumination of the at least one light source;
• and
• means for selectively connecting and disconnecting the communication of each at least one light source from its energy source, an electrical connection between the first and the second of the pair of the frictionally securing means using the electrically-conductive shaft comprising a portion of the selective connecting and disconnecting means.