Definition that contains rock drill
- drill rod carbon steel used for rock drills and dowels
- straight-fluted drill a rock drill with flutes that are straight
- drill steel carbon steel used for rock drills and dowels
- star drill a steel rock drill with a star-shaped point that is used for making holes in stones or masonry; it is operated by hitting the end with a hammer while rotating it between blows
- cross bit a rock drill having cruciform cutting edges; used in mining
- straight flute a rock drill with flutes that are straight