Have you inserted a long thin piece of something to drop into the hole to the top of the bolt? If you do that, and then measure it against the out side of the cue....if the line meets the hole depth you measured then it tells you how long of a tool you need....if the measurement falls short of the magnetic line.......you may have a weight bolt buried in the cue that they then put a wood plug after it to seal the deal. Call me tomorrow after 2pm EST if you still have my number.
Dave