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2. Hammer drill - Wikipedia

   en.wikipedia.org/wiki/Hammer_drill

   A hammer drill, also known as a percussion drill or impact drill, is a power tool used chiefly for drilling in hard materials. [ 1 ][ 2 ] It is a type of rotary drill with an impact mechanism that generates a hammering motion. The percussive mechanism provides a rapid succession of short hammer thrusts to pulverize the material to be bored, so ...

3. John Henry (folklore) - Wikipedia

   en.wikipedia.org/wiki/John_Henry_(folklore)

   Railroad worker. Known for. American folk hero. John Henry is an American folk hero. An African American freedman, he is said to have worked as a "steel-driving man"—a man tasked with hammering a steel drill into a rock to make holes for explosives to blast the rock in constructing a railroad tunnel.

4. Impact driver - Wikipedia

   en.wikipedia.org/wiki/Impact_driver

   Impact driver. A manual impact driver (for use with hammer) with screwdriver bits and adapters. An impact driver is a tool that delivers a strong, sudden rotational force and forward thrust. The force can be delivered either by striking with a hammer in the case of manual impact drivers, or mechanically in the case of powered impact drivers.

5. Milwaukee Electric Tool - Wikipedia

   en.wikipedia.org/wiki/Milwaukee_Electric_Tool

   Milwaukee Electric Tool Corporation, known more commonly as Milwaukee Tool, is a multi-national company that develops, manufactures, and markets power tools, hand tools, tool accessories, tool storage, and personal protective equipment. [1] Milwaukee Tool was last sold in 2005 for $626.6 million to the Hong Kong –based Techtronic Industries ...

6. Jackhammer - Wikipedia

   en.wikipedia.org/wiki/Jackhammer

   A jackhammer (pneumatic drill or demolition hammer in British English) is a pneumatic or electro-mechanical tool that combines a hammer directly with a chisel. It was invented by William McReavy, who then sold the patent to Charles Brady King. [ 1 ] Hand-held jackhammers are generally powered by compressed air, but some are also powered by ...

7. 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. This forces the cutting edge against the work ...