The distal tips of the fingers are separated by {HEAD ~ an axially aligned gap} which enables {TAIL ~ limited stress} relieving radial movement of the fingers 
The distal tips of the fingers are separated by { HEAD ~ an axially aligned gap } which enables { TAIL ~ limited stress } relieving radial movement of the fingers
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH