{HEAD ~ Mechanism} useful as a slip clutch or {TAIL ~ brake} and method of making same 
useful as
{ HEAD ~ Mechanism } useful as a slip clutch or { TAIL ~ brake } and method of making same
HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH