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 {HEAD ~ its diameter} to enable the drill to produce {TAIL ~ relatively deep bores} as compared to their diameters 
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 { HEAD ~ its diameter } to enable the drill to produce { TAIL ~ relatively deep bores } as compared to their diameters
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