{TAIL ~ A toothed front side} forced by {HEAD ~ the spring force} into engagement with the ratchet wheel in the box end 
{ TAIL ~ A toothed front side } forced by { HEAD ~ the spring force } into engagement with the ratchet wheel in the box end
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH