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2. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   The brad point drill bit (also known as lip and spur drill bit, and dowel drill bit) is a variation of the twist drill bit which is optimized for drilling in wood. Conventional twist drill bits tend to wander when presented to a flat workpiece. For metalwork, this is countered by drilling a pilot hole with a spotting drill bit.

3. Screwdriver - Wikipedia

   en.wikipedia.org/wiki/Screwdriver

   This is particularly useful for small screws, which are otherwise very difficult to attempt to handle. Many screwdriver designs have a handle with a detachable tip (the part of the screwdriver that engages the screw), called bits as with drill bits. This provides a set of one handle and several bits that can drive a variety of screw sizes and ...

4. Robertson screw - Wikipedia

   en.wikipedia.org/wiki/Robertson_screw

   Screwdriver bits in different sizes for Robertson screws. When Henry Ford tried the Robertson screws, he found that they saved considerable time in Model T production. When Robertson refused to license the design, Ford realized that the supply of screws would not be guaranteed, and chose to limit their use to his Canadian division. [4] [5] [6]

5. Brace (tool) - Wikipedia

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

   A brace and bit can be used to drill wider and deeper holes than can a geared hand-powered drill. The cost of the greater torque is lower rotational speed; it is easy for a geared hand drill to achieve a rotational speed of several hundred revolutions per minute , while it would require considerable effort to achieve even 100 rpm with a brace.

6. Yankee screwdriver - Wikipedia

   en.wikipedia.org/wiki/Yankee_screwdriver

   The trade name "Yankee" screwdriver was first marketed by North Brothers Manufacturing Company in ≈16 April 1895, with the No. ≠130 spiral ratchet screwdriver. Yankee soon became and still is a well-known name in automatic spiral ratchet screwdrivers , with several other models, and model improvements patented by North Bros. over a 40-year ...

7. List of screw drives - Wikipedia

   en.wikipedia.org/wiki/List_of_screw_drives

   An external Torx screw has a projecting head in the shape of a Torx screwdriver bit (instead of a standard recessed cavity); a Torx socket is used to drive it. The external "E" Torx nominal sizing does not correspond to the "T" size (for example, an E40 socket is too large to fit a T40, while an E8 Torx socket will fit a T40 Torx bit [ 68 ] ).