Modifications of the spool is provided to allow for different lengths of {TAIL ~ chain} to be wrapped around {HEAD ~ the spool} 
Modifications of the spool is provided to allow for different lengths of { TAIL ~ chain } to be wrapped around { HEAD ~ the spool }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD