The apparatus 20 includes {TAIL ~ a rigid base} 22 and {HEAD ~ six interfitting anvils} 24 supported by the base 22 for movement relative to one another and means, generally indicated 25, for moving the anvils relative to one another 
The apparatus 20 includes { TAIL ~ a rigid base } 22 and { HEAD ~ six interfitting anvils } 24 supported by the base 22 for movement relative to one another and means , generally indicated 25 , for moving the anvils relative to one another
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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