hole saw

== English == === Alternative forms === holesaw === Etymology === From hole +‎ saw. === Noun === hole saw (plural hole saws) A saw in the form of a hollow cylinder with teeth on the end or edge, used to produce holes on the workpiece and operated by rotation, often as an accessory to a power drill. ==== Synonyms ==== crown saw ==== Translations ==== ==== See also ==== trepan (trephine)