page_title: Drill bit
section_title: Core drill bit
hierarchical_section_title: Drill bit / Metal drill bits / Core drill bit
caption_attribution_description: A Magnetic drilling machine using Annular cutters for making holes in metal.
context_page_description: Drill bits are cutting tools used to remove material to create holes, almost always of circular cross-section. Drill bits come in many sizes and shapes and can create different kinds of holes in many different materials. In order to create holes drill bits are usually attached to a drill, which powers them to cut through the workpiece, typically by rotation. The drill will grasp the upper end of a bit called the shank in the chuck.
  Drill bits come in standard sizes, described in the drill bit sizes article. A comprehensive drill bit and tap size chart lists metric and imperial sized drill bits alongside the required screw tap sizes. There are also certain specialized drill bits that can create holes with a non-circular cross-section.
  While the term drill may refer to either a drilling machine or a drill bit while in use in a drilling machine, in this article, for clarity, drill bit or bit is used throughout to refer to a bit for use in a drilling machine, and drill refers always to a drilling machine.
context_section_description: The term core drill bit is used for two quite different tools.
caption: A magnetic core drilling machine making hole with annular cutter (core drill)
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