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