An adjustable bracket connects to {HEAD ~ the collar} to permit {TAIL ~ the adjustable bracket} to move axially along the spindle together with the collar 
to permit
An adjustable bracket connects to { HEAD ~ the collar } to permit { TAIL ~ the adjustable bracket } to move axially along the spindle together with the collar
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH