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A drill is a tool with a rotating drill bit used for drilling holes in various materials. Drills are commonly used in woodworking and metalworking.

The drill bit is gripped by a chuck at one end of the drill, and is pressed against the target material and rotated. The tip of the drill bit does the work of cutting into the target material, slicing off thin shavings (twist drills or auger bits) or grinding off small particles (oil drilling).

History


The earliest drills were probably bow drills. The invention of the electrical drill is credited to both Arthur James Arnot in 1889, at Melbourne, Australia and Wilhelm Fein [http://www.fein.de/corp/de/en/company/history.html, in 1895, at Stuttgart, Germany. In 1917, Black & Decker patented a trigger-like switch mounted on the handle.

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Finally got my buzz cut now I'm ready for drills tomorrow
Chrisrider (Chris) Fri, 08 Jan 2010 04:58:21 -0000
Finally got my buzz cut now I'm ready for drills tomorrow
Canadian Flexi Drills CANHS722 ONLY $33.29 AT WWW.CONSUMERELECTRONICSPLAZA.COM
ConsumerPlaza (ConsumerPlaza) Fri, 08 Jan 2010 04:58:02 -0000
Canadian Flexi Drills CANHS722 ONLY $33.29 AT WWW.CONSUMERELECTRONICSPLAZA.COM
3.5 mile run in 28 degree weather, Savage cardio, ground and pound drills, and weight lifting. I HURT SO GOOD.
al3xRuss (Alex Russ) Fri, 08 Jan 2010 04:55:26 -0000
3.5 mile run in 28 degree weather, Savage cardio, ground and pound drills, and weight lifting. I HURT SO GOOD.
The answer to this problem? Mat drills. And more millions for Saban. Yall don't pay him enough.
BearBryant (BearBryant) Fri, 08 Jan 2010 04:41:38 -0000
The answer to this problem? Mat drills. And more millions for Saban. Yall don't pay him enough.
@dearestdenise yup basketball drills
martizzle310 (Martin Beltran) Fri, 08 Jan 2010 04:27:14 -0000
@dearestdenise yup basketball drills
@JohnWProc Pure man power! Been doing a lot of drills and it seems to be helping. Time doesn't include approx 5 mins of breaks
rbuike (Rodney Buike) Fri, 08 Jan 2010 04:22:42 -0000
@JohnWProc Pure man power! Been doing a lot of drills and it seems to be helping. Time doesn't include approx 5 mins of breaks

 
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