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2. Drill bit sizes - Wikipedia

   en.wikipedia.org/wiki/Drill_bit_sizes

   Fractional drill bit set by Craftsman. Fractional-inch drill bit sizes are still in common use in the United States and in any factory (around the globe) that makes inch-sized products for the U.S. market. ANSI B94.11M-1979 sets size standards for jobber-length straight-shank twist drill bits from 1/64 inch through 1 inch in 1/64 inch increments.

3. Burr (cutter) - Wikipedia

   en.wikipedia.org/wiki/Burr_(cutter)

   Burrs are a rotary analog to files that cut linearly (hence their alternate name, rotary files). They share many similarities with endmills and router bits , with the notable distinction that the latter typically have their toolpaths dictated by the machine, while burrs are frequently operated in a freehand manner.

4. Howard R. Hughes Sr. - Wikipedia

   en.wikipedia.org/wiki/Howard_R._Hughes_Sr.

   The essential assets of Hughes Tool Company, as it was renamed, were August 10, 1909, patents for his dual-cone rotary drill bit. The fees for licensing this technology were the basis of Hughes Tool's revenues, and by 1914 the dual-cone roller bit was used in eleven U.S. states and in thirteen foreign countries.

5. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   From top: Spade, brad point, masonry, and twist drills bits Drill bit (upper left), mounted on a pistol-grip electric drill A set of masonry drills. A drill bit is a cutting tool used in a drill 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 ...

6. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

   www.aol.com

   AOL latest headlines, entertainment, sports, articles for business, health and world news.

7. Milwaukee Tool - Wikipedia

   en.wikipedia.org/wiki/Milwaukee_Tool

   By 1935, Milwaukee Electric Tool Corporation developed a lightweight 3/4" electric hammer drill. This power tool was designed to drill and sink anchors into concrete. This drill could also be converted into a standard 3/4" drill. Milwaukee also designed an easy-to-handle, single-horsepower sander/grinder that weighed only 15 pounds. [7]