{HEAD ~ Holes} are drilled to enable {TAIL ~ the selective coupling} of a ball mount and a lynchpin to a drop bar 
are drilled to enable
{ HEAD ~ Holes } are drilled to enable { TAIL ~ the selective coupling } of a ball mount and a lynchpin to a drop bar
HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH