bore bit
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Noun | 1. | bore bit - a drill for penetrating rock cross bit - a rock drill having cruciform cutting edges; used in mining drill - a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows) 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 straight flute, straight-fluted drill - a rock drill with flutes that are straight |
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