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2. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   Center drill bits, occasionally known as Slocombe drill bits, ... Similar auger bits are made with diameters from 6 mm (3/16 in) to 30 mm (1 3/16 in). Augers up to ...

3. List of drill and tap sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

   Example (inch, fine): For 7 ⁄ 16-20 (same diameter as the previous example, but this time with 20 threads per inch, which is considered fine), 0.437 in × 0.90 = 0.393 in (i.e., if the threads are to be fine, then a slightly larger diameter drill bit should be used before tapping the hole for the screw).

4. Drill bit sizes - Wikipedia

   en.wikipedia.org/wiki/Drill_bit_sizes

   For Morse taper-shank drill bits, the standard continues in 1/64 inch increments up to 1¾ inch, then 1/32 inch increments up to 2¼ inch, 1/16 inch increments up to 3 inches, 1/8 inch increments up to 3¼ inches, and a single 1/4 inch increment to 3½ inches. One aspect of this method of sizing is that the size increment between drill bits ...

5. 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 ...

6. Drilling - Wikipedia

   en.wikipedia.org/wiki/Drilling

   Drilling is a cutting process where a drill bit is spun to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point. The bit is pressed against the work-piece and rotated at rates from hundreds to thousands of revolutions per minute.

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9. AOL Mail for Verizon Customers - AOL Help

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