The shape of {HEAD ~ the mount} allows for it, and an engaged strap, to pass completely through {TAIL ~ a hole} in a structure and then be oriented so that the strap mount will be prevented from returning through the hole 
The shape of { HEAD ~ the mount } allows for it , and an engaged strap , to pass completely through { TAIL ~ a hole } in a structure and then be oriented so that the strap mount will be prevented from returning through the hole
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH