Definitions

from The Century Dictionary and Cyclopedia

  • n. A tool for gripping and extracting the drill-rod when the latter has been broken in the bore of a well and has fallen to the bottom.
  • n. A drilling- or boring-tool with one jaw which can go behind or below the object to be perforated, while the bit is on the face or end of the other jaw, so that closure of the jaws causes the bit to advance and make the hole.

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