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