{HEAD ~ A thumb break strap} or flap or other type of retainer may be used in {TAIL ~ this embodiment} 
{ HEAD ~ A thumb break strap } or flap or other type of retainer may be used in { TAIL ~ this embodiment }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL