You can MAKE a tool for this job. It's a bit of a bother, but anything is better than messing up those bolts.
You can start with a BIG screwdriver with a scrood tip, hacksaw the tip entirely off and square the shank with a grinder or bandsaw or something.
Then you use the drillpress and drill 2 small holes into the shank, straight down, insert rounded tool-steel or music-wire tips (it is extremely hard and stiff) NO more than a quarter-inch long, silver-solder into place and let cool. SHORTER the protruding tips are, the better.
Hope this helps.