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2. Annular cutter - Wikipedia

   en.wikipedia.org/wiki/Annular_cutter

   An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal. An annular cutter, named after the annulus shape , cuts only a groove at the periphery of the hole and leaves a solid core or slug at the center.

3. Hole saw - Wikipedia

   en.wikipedia.org/wiki/Hole_saw

   Tungsten carbide hole saw with arbor A 52 mm (2.0 in) hole saw with pilot bit A 115 mm (4.5 in) diamond hole saw. A hole saw (also styled holesaw), also known as a hole cutter, [1] is a saw blade of annular (ring) shape, whose annular kerf creates a hole in the workpiece without having to cut up the core material.

4. Gimlet (tool) - Wikipedia

   en.wikipedia.org/wiki/Gimlet_(tool)

   A gimlet is a hand tool for drilling small holes, mainly in wood, without splitting. It was defined in Joseph Gwilt's Architecture (1859) as "a piece of steel of a semi-cylindrical form, hollow on one side, having a cross handle at one end and a worm or screw at the other".

5. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   The correct tool to start a traditionally drilled hole (a hole drilled by a high-speed steel (HSS) twist drill bit) is a spotting drill bit (or a spot drill bit, as they are referenced in the U.S.). The included angle of the spotting drill bit should be the same as, or greater than, the conventional drill bit so that the drill bit will then ...

6. File (tool) - Wikipedia

   en.wikipedia.org/wiki/File_(tool)

   Saw sharpening files are usually single cut to deliver a smooth finish. They are suited to sharpening saw blades and dressing tool edges, especially where a finer, sharper edge or smoother surface finish is desired. The Chainsaw file is one example, used primarily for sharpening chainsaws. These appear to have a round cross-section, but are ...

7. 50 Fascinating ‘Old-Time Photos’ That Show You Just How Much ...

   www.aol.com/80-photos-past-might-transport...

   Image credits: Old-time Photos "That's why funny, unexpected and random events in old photos always seem so much more magical to me," Ed continued. "The odds of capturing that moment were ...