the collet comprises {TAIL ~ a planar member}, a lip portion, a beveled portion and {HEAD ~ one or more apertures} 
the collet comprises { TAIL ~ a planar member } , a lip portion , a beveled portion and { HEAD ~ one or more apertures }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD