When cocked, the hook rest on the bottom edge of {HEAD ~ a small hole} drilled in a lower corner of {TAIL ~ a hooded type mailbox door} 
When cocked , the hook rest on the bottom edge of { HEAD ~ a small hole } drilled in a lower corner of { TAIL ~ a hooded type mailbox door }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL