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2. 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.

3. The Best Hole Saws for Creating Perfectly Round Holes in a ...

   www.aol.com/lifestyle/best-hole-saws-creating...

   A pilot drill bit ensures that the saw is perfectly centered before it makes contact, reducing the chances of the blade skipping or walking across your workpiece. Hole saws come in a wide range of ...

4. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   1.25 in (32 mm) hole saw bit. Hole saws take the form of a short open cylinder with saw-teeth on the open edge, used for making relatively large holes in thin material. They remove material only from the edge of the hole, cutting out an intact disc of material, unlike many drills which remove all material in the interior of the hole.

5. Annular cutter - Wikipedia

   en.wikipedia.org/wiki/Annular_cutter

   An annular cutter is similar to a hole saw but differs in geometry and material. The two most common types are high-speed steel (HSS) and tungsten carbide tipped (TCT). Like a hole saw, but unlike a spiral drill bit, an annular cutter cuts only the periphery of a hole, leaving a circular "slug" at the center. [citation needed]

6. Drill - Wikipedia

   en.wikipedia.org/wiki/Drill

   High-Speed Drill Bits – these are drill bits made to be very strong and therefore are often used to cut metals; Spade drill Bits – spade-shaped drill bits used primarily to bore holes in softwoods; Hole Saw – a large drill bit with a jagged edge, ideal for cutting larger holes (mostly in wood).

7. List of drill and tap sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

   One of the most common ways to produce such threaded holes is to drill a hole of appropriate size with a drill bit and then tap it with a tap. Each standard size of female screw thread has one or several corresponding drill bit sizes that are within the range of appropriate size—slightly larger than the minor diameter of the mating male ...