The bit assembly comprises an elongated housing having {HEAD ~ a first end} adapted for engagement with the drill and a second end, including {TAIL ~ the cutting cone}, for engaging the material to be drilled 
The bit assembly comprises an elongated housing having { HEAD ~ a first end } adapted for engagement with the drill and a second end , including { TAIL ~ the cutting cone } , for engaging the material to be drilled
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH