The box type end 10 includes {HEAD ~ a circular peripheral wall} defining {TAIL ~ a chamber} therein for receiving a rachet wheel 11 therein 
defining
The box type end 10 includes { HEAD ~ a circular peripheral wall } defining { TAIL ~ a chamber } therein for receiving a rachet wheel 11 therein
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH