pitching borer
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Countersink — A countersink is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common usage is to allow the head of a countersunk bolt or screw, when placed in the hole, to sit flush with or below the surface of the… … Wikipedia
Machete — For other uses, see Machete (disambiguation). Older machete from Latin America The machete ( … Wikipedia
