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  • .... (31 cm), 8.5 in. (21 cm), or 6 in. (15 cm). A <b>drag bit</b> or <b>fish-tail bit</b> has teeth that cut and tear soft formations as the bit is rotated.
    765 bytes (125 words) - 18:36, 20 March 2017
  • .... (31 cm), 8.5 in. (21 cm), or 6 in. (15 cm). A <b>drag bit</b> or <b>fish-tail bit</b> has teeth that cut and tear soft formations as the bit is rotated.
    706 bytes (119 words) - 18:37, 20 March 2017