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