At one end stood a modified high-speed dental drill.
The process is very similar to a dental drill used by a dentist.
It's easier still to imagine the highway having been carved out of the granite by small men using dental drills.
That voice entered the ear like a dental drill: listening to it for eight hours a day would do anybody's head in.
By 1914, electric dental drills could reach speeds of up to 3000 rpm.
Starting in the 1990s, a number of alternatives to conventional rotary dental drills have been developed.
Then comes Kingsbury's alarm and it sounds like a dental drill.
One of his many inventions was a foot-driven dental drill.
He then uses a dental drill to slice into Marvin's tongue.
The boy's face was set hard as if against the pain of a dental drill.