each sprag having {HEAD ~ a body portion} with {TAIL ~ race engaging surfaces} and axially extending footed portions 
with
each sprag having { HEAD ~ a body portion } with { TAIL ~ race engaging surfaces } and axially extending footed portions
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH