The primary objective of the present invention is to provide a new and improved drill of the same general type as that disclosed in Shallenberger, U.S. Pat No 5,092,718, but having a length which is substantially greater than its diameter to enable {HEAD ~ the drill} to produce {TAIL ~ relatively deep bores} as compared to their diameters 
to produce
The primary objective of the present invention is to provide a new and improved drill of the same general type as that disclosed in Shallenberger , U.S. Pat No 5,092,718 , but having a length which is substantially greater than its diameter to enable { HEAD ~ the drill } to produce { TAIL ~ relatively deep bores } as compared to their diameters
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH