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